Antonio Rudiger reported he was subjected to racist chanting from the stands during Chelsea's 2-0 Premier League derby win at Tottenham.

Referee Anthony Taylor stopped the game and three announcements were made in the Tottenham Hotspur Stadium, reminding fans there is "no place for racism in the game".

Spurs have launched an investigation that could end in a stadium ban for any identified culprits.

Willian's brace sealed Chelsea's win with Son Heung-min sent off for the lacklustre hosts, but the match was overshadowed by events off the field.

"In terms of walking off the pitch, it would depend what the players were feeling and saying," Lampard said.

"But I would be absolutely, 100 per cent behind them and I'm sure it would be a group decision. But we're not there yet, so it's hypothetical to a degree.

"All I know is that Toni Rudiger said he heard some racist chanting or comments... Of course I'll support Toni as we would support any of our players, or in fact any opposition players.

"Wherever this happens it needs to be dealt with."

Rudiger alleged he was racially abused in the second half, following Son's red card for kicking out at the Germany defender.

German defender Rudiger tweeted after the game and included the hashtags #NoToRacism and #PleaseGetSomeBasicEducation.

A Tottenham statement read: "We are now conducting a thorough investigation which will include liaising with Chelsea and their players for their observations.

"Any form of racism is completely unacceptable and will not be tolerated in our stadium."

Jose Mourinho backed referee Taylor's stance in halting the match.

"I've not much to say apart from it's something that saddens me," he said.

"I hate racism in society, I hate racism in football, I'm disappointed that things like that can still happen.

"I didn't want the game to be stopped, but as soon as I knew the reasons why the game was stopped I obviously understood and accepted it."

Former England and Manchester United defender called for direct action against racism by players walking off the pitch, and admitted he was "ashamed" not to have done so in support of former teammate Ashley Cole.

"We have a racism problem in the Premier League in England. And the Premier League have to step up, they hide behind the FA on this issue," he said on Sky Sports.

"Ultimately I would be ashamed of myself for not doing (it) 15 years ago as I would be absolutely proud of players for doing it now..."

The Professional Footballers' Association condemned the latest incident.

"We believe that the time has come for all governing bodies to unite collectively to end this abuse. Tonight, the PFA calls for a government enquiry into racism within football..." it tweeted.

Australian Associated Press