ROUEN, France (Interstat) — A solitary first-half goal from Mamadou Diaby propelled the visiting Lorient U19 squad to a narrow 1-0 victory over Rouen in a National 1 fixture Friday afternoon at Stade Robert Diochon.

The match, contested between the senior Rouen side and the under-19 academy team of Lorient, delivered an upset as the young visitors secured all three points on the road. The result handed Lorient U19 a winning start to their campaign in France’s third division, while Rouen stumbled out of the gate at home.

The decisive moment arrived in the 36th minute. Following a sustained period of pressure, Lorient U19’s Mamadou Diaby found the breakthrough, slotting home to stun the home supporters. The goal stood as the game-winner in a contest where clear-cut chances were at a premium.

Rouen, which had been favored by statistical models pregame, struggled to translate possession into meaningful opportunities against a disciplined and resilient Lorient U19 defense. The home side’s frustrations grew as the match progressed, reflected in a series of yellow cards.

Rouen’s Shurwin Bouekou Mahania received the first booking in the 48th minute for a tactical foul. Teammate Lenny Pirringuel followed with a yellow in the 59th minute. Lorient U19’s Arthur Lallias was cautioned in the 71st minute as the visitors worked to protect their lead. The final booking came deep into second-half stoppage time, shown to Rouen’s Namakoro Diallo in the 94th minute.

The Lorient U19 backline, organized throughout, managed to see out the closing stages despite increased Rouen urgency, preserving the clean sheet and the victory. The final whistle confirmed a successful debut for the young squad in the National 1 competition, defying pregame projections that had given Rouen a slight probability edge to win.

With the victory, Lorient U19 opens its National 1 season with one win and no losses. Rouen begins its campaign with one loss and no wins. The records across all competitions for both clubs mirror their results in this opening fixture.

Rouen will seek a swift response to the opening-day defeat. The club is scheduled to return to action on the road against Aubagne in another National 1 match next Friday.