Liverpool spoiled Hoffenheim's European debut, FCSB stood tall to earn a draw at Sporting, and CSKA Moskva won away at Young Boys thanks to a bizarre own goal.
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Tuesday night's play-off first leg results (click scoreline for full coverage and highlights)
Wednesday night's first legs
What comes next?
The second legs will take place next Tuesday 22 and Wednesday 23 August. The winners of each tie will go into the draw for the UEFA Champions League group stage, which takes place in Monaco at 18:00CET on Thursday 24 August.