In his fifth appearance for Espanyol, Wu Lei earned a slice of LaLiga history by becoming the first Chinese player to score in the division.
Lionel Messi converted a penalty but saw his second spot-kick saved on Saturday, though Barcelona boss Ernesto Valverde is not worried.
Barcelona regained the winning habit in LaLiga against Real Valladolid, but Gerard Pique was far from impressed.
Ex-Barcelona goalkeeper Jordi Masip saved a penalty from Lionel Messi but an earlier successful conversion sunk Valladolid at Camp Nou.
Samuel Umtiti has not played since November due to a knee injury and coach Ernesto Valverde does not know when the defender will be fit.
Atletico Madrid drew level with Barcelona at the top of LaLiga, but did things the hard way in their dramatic 3-2 win over Real Valladolid.
Antoine Griezmann scored twice on his 300th LaLiga appearance as Atletico Madrid beat Real Valladolid 3-2 but he is feeling far from fresh.
Atletico Madrid ceded a two-goal lead at Real Valladolid but star man Antoine Griezmann came up with the winner on a landmark day.
Karim Benzema is without a goal in eight LaLiga games, but Real Madrid caretaker coach Santiago Solari praised the forward.
Vinicius Junior forced a late own goal before Sergio Ramos converted from the spot to give Real Madrid a battling win over Real Valladolid.