Chelsea registered a 2-0 victory over their London rivals Tottenham in the Premier League but the win was overshadowed by allegations of racist abuse.
It's after Chelsea defender Antonio Rudiger reported he had been subjected to discriminatory chanting by fans.
Brazilian forward Willian scored both goals before Spurs striker Son Heung-Min was shown a straight red card for violent conduct.
Elsewhere, Watford beat Manchester United 2-0 to win their first game under new manager Nigel Pearson.
Alcaraz swats aside Walton as career Grand Slam bid begins
Carlos Alcaraz kicked off his latest bid for a career Grand Slam by dismantling unseeded Australian Adam Walton 6-3 7-6(2) 6-2 in the first round of the Australian Open on Sunday, as the world number one showcased the power and precision befitting a player chasing history.
Danilovic makes epic comeback to knock Venus Williams out in Melbourne
Olga Danilovic beat Venus Williams 6-7(5) 6-3 6-4 at the Australian Open on Sunday after the Serbian fought back from 4-0 down in the deciding set to knock the American veteran out of the Australian Open in the first round.
Sabalenka eases through to Australian Open second round
Aryna Sabalenka came under early pressure as she launched her bid for a third Australian Open title but the Belarusian clicked into gear and overpowered French wildcard Tiantsoa Rakotomanga Rajaonah 6-4 6-1 to reach the second round on Sunday.
Zverev passes Diallo test at Austalian Open
Alexander Zverev launched his bid for a maiden Australian Open title with a shaky first-round win over Canadian Gabriel Diallo as disgruntled fans fumed over long queues and a surprise ticket sales halt on day one.
Nigeria edge Egypt on penalties for third place at Cup of Nations
Nigeria secured third place at the Africa Cup of Nations, edging Egypt 4-2 on penalties after a goalless draw in Saturday’s bronze medal match.
