Robert Lewandowski scored twice as La Liga champions Barcelona ended their season with a dominant 3-0 win over Athletic Club, completing a domestic treble under new manager Hansi Flick. Already crowned champions with two games to spare, Barca opened the scoring with their 100th league goal in the 14th minute, as Lewandowski chipped past Unai Simon.

The Polish striker added a second just three minutes later with a clinical header from Raphinha’s corner, taking his tally to 27 La Liga goals and 40 overall this season. Substitute Dani Olmo converted a stoppage-time penalty to cap the win, sealing Barca’s 28th league title, finishing with 88 points — four ahead of rivals Real Madrid.

Despite early chances for Athletic Club striker Maroan Sannadi, who missed two key opportunities, the hosts couldn’t break through. Veteran Oscar de Marcos made his final appearance for the club, earning a standing ovation as he handed the armband to Inaki Williams.

Barca's treble includes the La Liga title, Copa del Rey, and Spanish Super Cup, marking a perfect debut season for Flick. Lewandowski finished second in the scoring charts behind Real Madrid’s Kylian Mbappé (31 goals). Athletic Club secured a Champions League spot, finishing fourth on 70 points, level with Villarreal.