diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 0979c5e..42ecc22 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -361,7 +361,13 @@
       "Bash(curl -s -o /dev/null -w \"teecup.teeoff.no/rounds: %{http_code}\\\\n\" https://teecup.teeoff.no/rounds)",
       "Read(//home/**)",
       "Bash(rm -f \"tee-cup-login-screen \\(10\\).zip\" \"tee-cup-login-screen \\(11\\).zip\" \"tee-cup-login-screen \\(12\\).zip\")",
-      "Bash(curl -s -o /dev/null -w \"teecup.teeoff.no/rounds/new: %{http_code}\\\\n\" https://teecup.teeoff.no/rounds/new)"
+      "Bash(curl -s -o /dev/null -w \"teecup.teeoff.no/rounds/new: %{http_code}\\\\n\" https://teecup.teeoff.no/rounds/new)",
+      "Read(//tmp/claude-1000/**)",
+      "Bash(docker exec teeoff_api python3 -c ' *)",
+      "Bash(curl -s -D - https://teecup.teeoff.no/rounds -o /tmp/rounds_get.out)",
+      "Bash(curl -s -D - https://teecup.teeoff.no/rounds/00000000-0000-0000-0000-000000000000 -o /tmp/rounds_id_get.out)",
+      "Bash(grep -n '\"/rounds\\\\|`/rounds\\\\|href=\"/rounds\\\\|href={`/rounds' components/own-rounds.tsx components/new-round.tsx components/round-detail.tsx components/round-card.tsx components/dashboard.tsx app/page.tsx)",
+      "Bash(grep -n '\"/rounds\\\\|`/rounds\\\\|href=\"/rounds\\\\|href={`/rounds\\\\|router\\\\.\\\\\\(push\\\\|replace\\\\\\)\\(.*rounds' components/own-rounds.tsx components/new-round.tsx components/round-detail.tsx components/round-card.tsx components/dashboard.tsx)"
     ],
     "additionalDirectories": [
       "/opt/teeoff/deploy",
diff --git a/Screenshot_20260723-113235.png b/Screenshot_20260723-113235.png
new file mode 100644
index 0000000..6d8d107
Binary files /dev/null and b/Screenshot_20260723-113235.png differ
diff --git a/Screenshot_20260723-113302.png b/Screenshot_20260723-113302.png
new file mode 100644
index 0000000..db941bd
Binary files /dev/null and b/Screenshot_20260723-113302.png differ
diff --git a/frontend/app/rounds/[id]/page.tsx b/frontend/app/my-rounds/[id]/page.tsx
similarity index 100%
rename from frontend/app/rounds/[id]/page.tsx
rename to frontend/app/my-rounds/[id]/page.tsx
diff --git a/frontend/app/rounds/new/page.tsx b/frontend/app/my-rounds/new/page.tsx
similarity index 100%
rename from frontend/app/rounds/new/page.tsx
rename to frontend/app/my-rounds/new/page.tsx
diff --git a/frontend/app/rounds/page.tsx b/frontend/app/my-rounds/page.tsx
similarity index 100%
rename from frontend/app/rounds/page.tsx
rename to frontend/app/my-rounds/page.tsx
diff --git a/frontend/components/dashboard.tsx b/frontend/components/dashboard.tsx
index 4229c99..0146e21 100644
--- a/frontend/components/dashboard.tsx
+++ b/frontend/components/dashboard.tsx
@@ -233,7 +233,7 @@ export function Dashboard() {
           <Wordmark compact />
           <div className="flex items-center gap-1">
             <Link
-              href="/rounds"
+              href="/my-rounds"
               className="inline-flex items-center gap-1.5 rounded-lg px-2 py-1.5 text-sm font-semibold text-muted-foreground transition-colors hover:text-foreground"
             >
               <Flag aria-hidden="true" className="size-4" />
@@ -298,7 +298,7 @@ export function Dashboard() {
 function PersonalRoundsEntry() {
   return (
     <Link
-      href="/rounds"
+      href="/my-rounds"
       className="group flex items-center gap-4 rounded-2xl border border-border bg-card p-4 shadow-sm shadow-black/5 transition-colors hover:border-primary/50 sm:p-5"
     >
       <div className="flex size-11 shrink-0 items-center justify-center rounded-xl bg-primary/15">
diff --git a/frontend/components/new-round.tsx b/frontend/components/new-round.tsx
index 0b311cb..9fc802d 100644
--- a/frontend/components/new-round.tsx
+++ b/frontend/components/new-round.tsx
@@ -229,7 +229,7 @@ export function NewRound() {
     <div className="flex min-h-[100dvh] flex-col bg-background">
       <header className="sticky top-0 z-10 border-b border-border bg-background/80 backdrop-blur">
         <div className="mx-auto flex w-full max-w-3xl items-center justify-between gap-4 px-5 py-4">
-          <BackLink step={step} setStep={setStep} onExit={() => router.push("/rounds")} />
+          <BackLink step={step} setStep={setStep} onExit={() => router.push("/my-rounds")} />
           <Wordmark compact />
         </div>
       </header>
@@ -275,7 +275,7 @@ export function NewRound() {
                 course={course}
                 ownGender={ownGender}
                 onSubmit={submitRound}
-                onCreated={(id) => router.replace(`/rounds/${id}`)}
+                onCreated={(id) => router.replace(`/my-rounds/${id}`)}
               />
             )}
           </>
diff --git a/frontend/components/own-rounds.tsx b/frontend/components/own-rounds.tsx
index 66ef3ee..091e4db 100644
--- a/frontend/components/own-rounds.tsx
+++ b/frontend/components/own-rounds.tsx
@@ -95,7 +95,7 @@ export function OwnRounds() {
           </div>
 
           <Button
-            render={<Link href="/rounds/new" />}
+            render={<Link href="/my-rounds/new" />}
             size="lg"
             className="h-12 shrink-0 gap-2 rounded-2xl px-6 text-base font-bold shadow-sm"
           >
diff --git a/frontend/components/round-card.tsx b/frontend/components/round-card.tsx
index 9432cd0..8d624d3 100644
--- a/frontend/components/round-card.tsx
+++ b/frontend/components/round-card.tsx
@@ -59,7 +59,7 @@ export function RoundCard({ round }: { round: Round }) {
 
   return (
     <Link
-      href={`/rounds/${round.id}`}
+      href={`/my-rounds/${round.id}`}
       className="group flex min-h-[88px] w-full items-center gap-4 rounded-2xl border border-border bg-card p-5 text-left shadow-sm shadow-black/5 transition-colors hover:border-primary/60 hover:bg-accent/50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background"
     >
       <div className="flex min-w-0 flex-1 flex-col gap-3">
diff --git a/frontend/components/round-detail.tsx b/frontend/components/round-detail.tsx
index dc18ba4..0ccaeb2 100644
--- a/frontend/components/round-detail.tsx
+++ b/frontend/components/round-detail.tsx
@@ -326,7 +326,7 @@ export function RoundDetail({ roundId }: { roundId: string }) {
     return (
       <div className="flex min-h-[100dvh] flex-col items-center justify-center gap-4 bg-background px-5 text-center">
         <p className="text-base font-medium text-destructive">{error}</p>
-        <Link href="/rounds" className="text-base font-semibold text-primary underline underline-offset-2">
+        <Link href="/my-rounds" className="text-base font-semibold text-primary underline underline-offset-2">
           Tilbake til egne runder
         </Link>
       </div>
@@ -347,7 +347,7 @@ export function RoundDetail({ roundId }: { roundId: string }) {
       <header className="sticky top-0 z-20 border-b border-border bg-background/90 backdrop-blur">
         <div className="mx-auto flex w-full max-w-3xl items-center gap-3 px-5 py-4">
           <Link
-            href="/rounds"
+            href="/my-rounds"
             aria-label="Tilbake til egne runder"
             className="flex size-11 shrink-0 items-center justify-center rounded-xl border border-border bg-card text-foreground transition-colors hover:bg-accent/50"
           >
diff --git a/frontend/next.config.mjs b/frontend/next.config.mjs
index c59f9fd..b17d955 100644
--- a/frontend/next.config.mjs
+++ b/frontend/next.config.mjs
@@ -17,6 +17,21 @@ const nextConfig = {
   // vinner presedens og siden blir uoppnåelig (rå API-404 i stedet).
   // Legg nye frontend-sider et sted UTENFOR disse prefiksene (se
   // app/organizations/[id]/members for eksempelet dette ble rettet på).
+  //
+  // SAMME FELLE, VERRE UTSLAG (funnet 2026-07-23, ADR-033): en EKSAKT
+  // kollisjon (ikke bare nøsting) mellom en frontend-side og et
+  // rewrite-prefiks slår begge veier. `/rounds` var opprinnelig BÅDE en
+  // frontend-liste-side OG rounds.py sitt API-prefiks -- statisk side vs.
+  // eksakt rewrite: SIDEN vant, så `fetch("/rounds")`/`POST /rounds` fra
+  // klienten traff aldri backend (fikk Next sin egen HTML tilbake, JSON-
+  // parsing feilet stille). `/rounds/[id]` (DYNAMISK side) vs.
+  // `/rounds/:path*`: REWRITEN vant, så selve rundedetalj-siden var
+  // fullstendig uoppnåelig (rå backend-JSON i stedet for UI-et). Løst ved
+  // å flytte frontend-sidene til et HELT ANNET toppnivå-prefiks
+  // (`/my-rounds/*`) som ikke overlapper `/rounds/*` i det hele tatt --
+  // API-et beholder `/rounds` uendret. Lærdom: et rewrite-prefiks og en
+  // frontend-sides toppnivå-segment må ALDRI være identisk streng, selv
+  // om det virker naturlig (f.eks. "runder" for begge).
   async rewrites() {
     return [
       { source: "/auth/:path*", destination: `${API_ORIGIN}/auth/:path*` },