Atletico Madrid climbed above Barcelona into second in La Liga thanks to a 2-0 win at home to Deportivo La Coruna in a match overshadowed by the death of a Deportivo fan in violent clashes near the stadium.
A 43-year-old supporter of the Galician club, who was not identified by name, had to be fished out of the freezing Manzanares river near Atletico's Calderon stadium after dozens of rival fans battled in the streets a few hours before kickoff.
He suffered cardiac arrest, hypothermia and head injuries and hospital sources later said he had died shortly after 2 pm local time (1300 GMT) after failing to respond to efforts to revive him.
Earlier, midfielder Saul Niguez had put Atletico ahead two minutes before halftime and playmaker Arda Turan made it 2-0 10 minutes into the second half to lift Diego Simeone's side to 29 points from 13 matches, four behind leaders Real Madrid.
It was Atletico's fifth victory in their last six La Liga outings as they seek to defend the Spanish title they won last season for the first time in 18 years.
Earlier, Real set a club record of 16 straight victories in all competitions when they won 2-1 at Malaga on Saturday.
Barca can climb back above Atletico into second, two points behind Real, with a win at fourth-placed Valencia later on Sunday.