Real Madrid made it four wins out of four to start their LaLiga campaign but had to hang on for a 2-1 win at Real Sociedad after playing almost an hour with 10 men.
Kylian Mbappé gave Xabi Alonso's side an early lead before Dean Huijsen controversially saw red in the 31st minute for denying a clear goalscoring opportunity.
Arda Güler's strike just before half-time gave Madrid breathing room and they would need it in the second half as Mikel Oyarzabal's 56th-minute penalty got the hosts back into the game and they threatened to find a late equaliser, piling on the pressure in the last 20 minutes.