LONDON (AFP) - Manchester United manager Jose Mourinho accused his players of making "incredible mistakes" after they lost 4-0 to Chelsea on his return to his former club on Sunday.
Goals from Pedro Rodriguez, after 30 seconds, Gary Cahill, Eden Hazard and N'Golo Kante condemned Mourinho to his heaviest defeat since Real Madrid's 5-0 demolition by Barcelona in November 2010.
It left United seventh in the Premier League table, five points below Chelsea, who climbed to fourth, and six points behind leaders Manchester City, Arsenal and Liverpool.
"You come with a strategy. You cannot concede a goal in the way we did," Mourinho told Sky Sports at Stamford Bridge.
"We were coming to have an offensive approach. We wanted to create chances. We showed that after the 1-0.
"The second and the third were counter-attack goals. If we score a goal like we almost did for 2-1, the game would be different.
"It is one of those days when you give the advantage to opponents by doing nothing.
"We made incredible defensive mistakes, individual mistakes, and you pay for that."
After the final whistle, a stern-faced Mourinho whispered into the ear of his opposite number Antonio Conte for some time before stalking down the tunnel.
Conte had exhorted the home fans to make more noise after Kante scored Chelsea's fourth goal in the 70th minute.
But Mourinho refused to reveal what he had said to the Italian: "My words with Antonio Conte were for him, not for you."
Mourinho was appointed by United in May after being sacked by Chelsea owner Roman Abramovich for a second time last December.
He won three Premier League titles, three League Cups and one FA Cup over his two spells with Chelsea - 2004-2007 and 2013-2015 - making him the London club's most successful manager.