Paris prosecutors have opened an investigation into former France and Manchester United defender Patrice Evra over "homophobic insults" aimed at Paris Saint-Germain, a judicial source told AFP on Monday.

Cesar Azpilicueta has called for unity at Chelsea after fans demanded the sacking of manager Maurizio Sarri during their comeback win at Cardiff.

Barcelona, Juventus and Paris Saint-Germain all moved closer to retaining their domestic titles this weekend, but there were plenty of other talking points in Europe.

Former England manager Steve McClaren has been sacked by second-tier English club Queens Park Rangers, their director of football Les Ferdinand announced on Monday.

Bayern Munich coach Niko Kovac questioned his team's attitude after Saturday's 1-1 draw in Freiburg saw Bayern slip two points behind rivals Borussia Dortmund in the Bundesliga title race.

"I am not just disappointed, I am also annoyed," said Kovac. 

Unai Emery has challenged Denis Suarez to finally make an impact as Arsenal bid to climb back into the Premier League's top four against Newcastle on Monday.

Phil Jones has saluted Ole Gunnar Solskjaer as a "breath of fresh air" after Manchester United made a winning start to the manager's permanent reign.

Lionel Messi continued his remarkable run of form as his second-half double, including an impudent free-kick, helped Barcelona continue their march towards the La Liga title on Saturday with a 2-0 win over Espanyol.

Rising teenage star Moise Kean stepped up in the absence of Cristiano Ronaldo to rescue a 1-0 win for Juventus against lowly Empoli on Saturday as the champions opened up an 18-point lead at the top of Serie A.

Juventus coach Massimiliano Allegri confirmed on Friday Cristiano Ronaldo is an injury doubt for the Champions League quarter-final first leg against Ajax on April 10.