MANCHESTER, England (AP) — Manchester United Manager Erik ten Hag says Cristiano Ronaldo refused to come on as a substitute in their 2-0 win over Tottenham.

Ronaldo headed to the locker room before the final whistle on Wednesday at Old Trafford in a show of dissent and has since been omitted from United’s squad for the trip to play Chelsea today.

Ten Hag held talks with Ronaldo yesterday and said the Portugal striker “remains an important part of the squad”.

However, Ten Hag said Ronaldo had to be disciplined for the sake of the culture within the team, having already been critical of the player and some of his teammates for leaving a preseason friendly against Rayo Vallecano early in July.

“I have to set standards and values, and control them,” Ten Hag said.

“I set a warning at the start of the season and the next time there has to be consequences. Otherwise, when you are living together, when you are playing together — and football is a team sport — you have to fulfil certain standards and I have to control it.”

The 37-year-old Ronaldo took to social media late Thursday to explain his behaviour in the Tottenham game.

“I’ve always tried to set the example myself for the youngsters that grew in all the teams that I’ve represented,” Ronaldo wrote on Instagram. “Unfortunately that’s not always possible and sometimes the heat of the moment [gets] the best of us.”

Ronaldo trained away from the first team yesterday.