Celtic’s final push towards a second successive Bank of Scotland Premier League title suffered another setback at Tannadice thanks to Jon Daly’s stunning late leveller for 10-man Dundee United.
Celtic took the lead when Shunsuke Nakamura scored a trademark free-kick just after the interval and the runaway league leaders looked to have all three points wrapped up when Barry Robson was sent off in the 89th minute for head-butting Lee Naylor off the ball.
But Daly scored two minutes into injury time with a terrific strike, as Celtic’s disappointing recent form – which saw them lose to Rangers and Falkirk in their previous two games – continued.
Celtic finally fashioned another good opening with 17 minutes remaining, as a neat passing exchange between McGeady and Vennegoor of Hesselink played the Dutchman in behind the home defence.
Vennegoor of Hesselink did well to turn a shot towards the back post, but his effort rolled wide as Zurawski failed to use his central position to good effect and attack the ball.
The game then turned tetchy as Lee Wilkie was cautioned for a foul on Vennegoor of Hesselink, before the Holland international was also booked, a minute later, for dissent.
Referee Iain Brines had more work to do in the 89th minute, when Robson and Naylor squared up off the ball and the United captain was dismissed for aiming a headbutt at the Celtic defender.
Despite going a man down the home side refused to accept defeat and when Duff’s long ball found Daly, the United striker chested the ball down and launched a brilliant half-volley past Boruc to secure an unlikely share of the spoils.