The decision to rest stars backfired on Arsene Wenger as a 4-2 collapse at Nottingham Forest saw defending champions Arsenal getting knocked out of the FA Cup in the third round on Sunday.Eric Lichaj scored twice for the hosts either side of a Per Mertesacker equaliser to give Forest a 2-1 halftime lead.Ben Brereton, one of seven players aged 23 or under in the Forest side, made it 3-1 from the penalty spot in the 64th minute.Danny Welbeck took advantage of an error to pull a goal back for Arsenal with 12 minutes left but Forest were awarded another penalty which Kieran Dowell converted.”It hurts even more because it’s a competition we love,” said Wenger, who has lifted the FA Cup in three of the last four seasons and is the 145-year-old competition’s most successful manager with seven triumphs.While Wenger has endured a Premier League title drought since 2004, success in soccer’s oldest cup competition has helped the Frenchman to gain new contracts.The manner of the loss in Nottingham was mortifying for Wenger, who was forced to watch from the stands as he started a three-match touchline ban for misconduct toward a referee.”They were sharper than us,” Wenger said, “more incisive and more dominant in the challenges.”After Lichaj headed in Kieran Dowell’s free kick in the 20th minute, Per Mertesacker quickly leveled but the American defender was on target again just before halftime. Rob Holding’s weak headed clearance fell straight to Lichaj, who brought the ball down with his chest and unleashed a dipping volley into the far corner of the net.advertisement”My wife told me that if I get a hat trick any time during the year, then I get a dog,” Lichaj said. “So I was trying to get the penalty.”TOOTHLESS WEST HAMWhile West Ham avoided being eliminated at Shrewsbury, midfielder Josh Cullen did have a tooth knocked out.And the 0-0 draw means West Ham will have to face the third-tier side again with a replay at the Olympic Stadium after struggling in its third game in five days.Cullen had a front tooth inadvertently kicked out by Shrewsbury midfielder Abu Ogogo as they both went for the ball in the 75th minute. The tooth was recovered from the turf, while a bloodied Cullen was cleaned up on the touchline before returning to the action.KANE DOUBLELike West Ham, Tottenham struggled to breakdown a third-tier side but it did find a breakthrough after 63 minutes against AFC Wimbledon.Harry Kane made up for Tottenham’s profligacy by scoring twice inside two minutes. And Jan Vertonghen netted from 30 yards (meters) in the 71st minute to seal a 3-0 victory at Wembley Stadium – the site of the final being used as the north London club’s temporary home this season.LEEDS UPSETHours before Arsenal’s shock loss, fourth-tier side Newport knocked out Leeds, which is 53 places higher in the league ladder in the second-tier Championship.Leeds led through Gaetano Berardi’s ninth-minute strike but Newport leveled through Conor Shaugnessy’s own-goal in the 76th and Shawn McCoulsky’s 89th-minute header sealed a 2-1 victory.Leeds finished with 10 men after Spanish forward Samuel Saiz was sent off in stoppage time for spitting at Newport midfielder Robbie Willmott.