Chelsea claimed their inaugural win under new manager Enzo Maresca, defeating Servette 2-0 in the first leg of their Conference League play-off round on Thursday.
The home team struggled to break down their opponents in the first half at Stamford Bridge until Christopher Nkunku converted a 50th-minute penalty, marking his fourth goal for the club.
Marc Guiu astonishingly missed an open goal a few minutes later, but Noni Madueke brought Chelsea closer to securing a group-stage spot by scoring off a pass from Enzo Fernandez.
Tiemoko Ouattara nearly netted one for the Swiss side Servette late in the match when his deflected shot struck the crossbar.
