Petr Cech has admitted he should have stopped Wigan's equaliser in Chelsea's costly 1-1 draw at the DW Stadium.
The Blues were headed for victory in Saturday's Barclays Premier League game before Cech fumbled Hugo Rodallega's 88th-minute shot, allowing Jordi Gomez to snatch a share of the spoils. The draw saw Chelsea fail to follow up Monday night's vital win over Manchester City with another three points.
Goalkeeper Cech told his official website, www.petr-cech.com: "At the moment of the shot I didn't see the ball at all."
He added: "One of my team-mates ran across my viewpoint, I lost the ball from my view and it bounced off me. It's bad luck but, despite all that, I should have coped with it. I shouldn't let in such goals.
"This has downgraded the win over City in a way but there is nothing we can do now.
"There are lots of matches to be played and already on Thursday we have the big derby at Tottenham, who are with us inside the top four and we need to beat them."
Cech also revealed he would no longer wear the protective face mask he has donned in every game since breaking his nose in last month's 1-0 win at Blackburn.
"After an agreement with the doctors, I don't have to use it in the Tottenham game," he said.