LONDON (AP) — Champions League winner Real Madrid collapsed after leading by two goals to lose 4-2 at Real Sociedad in the Spanish league on Sunday, while Lionel Messi came away with a leg injury after helping Barcelona to its second straight win to start the season.
In England, Liverpool convincingly beat Tottenham, while Arsenal slumped to its second draw in three matches.
Here is a look at the action from Europe's top leagues on Sunday:
Madrid was playing without injured star Cristiano Ronaldo but looked set for a routine victory at Anoeta Stadium after dominating the first half hour with goals by Sergio Ramos and Gareth Bale.
But David Zurutuza scored twice for Sociedad and Inigo Martinez and Carlos Vela added goals as the hosts fought back.
"We were horrible," said Madrid goalkeeper Iker Casillas. "The game was negative in every aspect. We can't continue to play like this."
Barcelona won 1-0 at Villarreal after Messi set up the winning goal in the 82nd minute, taking Neymar's throughball and drawing goalkeeper Sergio Asenjo off his line before picking out substitute Sandro Ramirez to push the winner into the net.
The 19-year-old Ramirez was making his Barcelona debut and had come on as a substitute just 12 minutes earlier.
Barcelona said after the game that Messi had sustained a right leg muscle injury and would undergo tests on Monday.
Neymar came on as a second-half substitute for his first competitive game since fracturing a vertebra at the World Cup, having missed last weekend's league opener with a left ankle sprain.
Liverpool had the look of Premier League title challengers again during an impressive 3-0 win at Tottenham, while Arsenal's scoring struggles were once more exposed in a 1-1 draw at Leicester.
Alexis Sanchez's first league goal for Arsenal since joining from Barcelona was canceled out in the first half inside two minutes by Leonardo Ulloa's header for newly-promoted Leicester.
Liverpool, though, recovered from its setback at Manchester City at the start of the week with a convincing performance at Tottenham. Newly signed striker Mario Balotelli made his debut, but the goals came from forward Raheem Sterling, captain Steven Gerrard's penalty and new defender Alberto Moreno.
Unbeaten Aston Villa beat Hull 2-1 for its second win in three games.
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