Son Heung-min was back on form for Los Angeles FC as they defeated Cruz Azul 3-0 in the first leg of their Champions Cup quarter-final tie.

David Martinez scored a brace after Son had broken the deadlock for LAFC on the half-hour mark, leaving Cruz Azul with a mountain to climb in next week's second leg if they are to continue their trophy defence.

The visitors almost went ahead at BMO Stadium in the ninth minute when Gabriel Fernandez sent a powerful header towards the bottom-left corner, but Hugo Lloris went full stretch to parry the ball away from danger.

LAFC slowly worked their way into the game before Son slid in to convert from Mathieu Choiniere's low cross, and the Canadian was on hand to provide another assist nine minutes later as his long ball was taken down and swept in by Martinez.

Twenty-year-old Martinez then doubled his tally in the 58th minute, dribbling past three players in a solo run from the halfway line before picking out the far corner with a clinical finish.

Cruz Azul pushed on late to reduce their first-leg deficit and almost got a goal back through Jose Paradela, but Lloris was once again on hand to tip the Argentine's driven shot around the post.

Elsewhere, Nashville SC and Club America played out a 0-0 draw in their quarter-final first leg at Geodis Park, with the Mexican side facing Cruz Azul in a league meeting this weekend before playing their respective Champions Cup last-eight second legs.

Data Debrief: Son breaks scoring duck

While Son's playmaking prowess has been clear to see this season, highlighted by his four-assist display against Orlando City in the league last time out, this was just his second goal in 2026 and first since February 17 (versus Real Espana).

And while Son and Martinez got the goals, it was Denis Bouanga who provided a constant threat for LAFC. He produced game-high figures for shots (four), touches in the opposition box (eight) and dribbles attempted (10).

Overall, LAFC registered 1.05 expected goals (xG) from eight shots to Cruz Azul's 0.56 from 15 attempts, with both teams hitting the target five times.