Manchester United and Arsenal failed to take advantage of Chelsea's inactivity in the snowbound Premier League when they were held to draws by Birmingham City and Everton on Saturday. United came from behind to draw 1-1 at Birmingham while Arsenal rescued a point when a last-gasp Tomas Rosicky equalizer earned a 2-2 home draw with Everton. The results left Chelsea, which had its match at Hull City postponed because of the icy weather, clear at the top with 45 points from 20 matches followed by United with 44 from 21 and Arsenal with 42 from 20. Tottenham Hotspur, which had Sunday's trip to Liverpool called off, is fourth with 37 points from 20 games. United, knocked out of the FA Cup last week by League One (third division) Leeds United, looked to be heading for another defeat at Birmingham. The home team, which set a club record by stretching its unbeaten run to 12 league games, took the lead through Cameron Jerome after 39 minutes when United failed to clear a corner. Birmingham more than matched the champion until Scott Dann conceded an own goal after 63 minutes when the visitors pressurized the City defense. United finished with 10 men after Darren Fletcher was shown a second yellow card for a trip on Jerome six minutes from time. At the Emirates, Rosicky's late goal saved Arsenal as the Londoners missed the chance to move within a point of Chelsea. The Czech substitute finished off a flowing move with a deflected shot to grab a point for the hosts after Steven Pienaar's superb breakaway goal 11 minutes earlier looked to have won it for Everton in a second-half snowstorm. Arsenal had won four and drawn one of its last five league games and crushed Everton 6-1 at Goodison Park on the opening day of the season. However, David Moyes' team is enjoying its own good run at the moment and was far tougher opposition this time. The visitors took the lead after 12 minutes when US international Landon Donovan, making his debut after joining on a short-term loan this week, swung over a corner and Leon Osman produced an excellent leap to power in a header. Arsenal leveled after 28 minutes when Denilson's 25-meter shot deflected off Osman and beyond wrong-footed keeper Tim Howard. Everton survived plenty of pressure as the snow made conditions awkward in the second half and then took the lead nine minutes from time when Tim Cahill sent Pienaar clear and the South Africa midfielder beat Manuel Almunia with a cool, dinked finish. Almunia prevented a third Everton goal with a good save from James Vaughan before Arsenal roared back into the attack as another neat passing move left Rosicky clear and his shot was deflected past the unfortunate Howard. The goal brought relief to the frozen home fans but, having seen his team claw its way back from an 11-point deficit five weeks ago, manager Arsene Wenger is likely to see the result as a missed opportunity.