Chelsea's Didier Drogba (top) collides with Norwich City's John Ruddy and was stretchered off during their match in London Saturday. — Reuters Drogba suffers serious injury LONDON — Juan Mata scored on his Chelsea debut in a 3-1 home win over promoted Norwich City while Jordan Henderson and Charlie Adam netted their first Liverpool goals in another 3-1 triumph over Bolton Wanderers Saturday. The victories gave the two big-spending sides seven points from three matches and pushed them to the top of the Premier League table alongside Wolverhampton Wanderers, who drew 0-0 at Aston Villa. Manchester City and Manchester United can make it nine points from three games if they win Sunday, at Tottenham Hotspur and at home to Arsenal respectively. At the other end of the table Blackburn Rovers remain bottom without a point after Junior Hoilett and Mauro Formica missed penalties in a 1-0 home defeat by Everton who prevailed when Mikel Arteta made no mistake with his injury-time spotkick. Last season's runner-up Chelsea has failed to sparkle in the early weeks of the campaign but Portuguese full back Jose Bosingwa gave it a superb early start with a rare goal from 22 meters. Norwich equalized in comical fashion when stand-in goalkeeper Hilario dropped a cross and Grant Holt hooked the ball into an empty net midway through the second half but the host went ahead again through Frank Lampard's 82nd-minute spotkick. The penalty was awarded after Norwich goalkeeper John Ruddy was dismissed for bringing down Ramires. Spanish substitute Mata, who signed from Valencia this week, then exposed Norwich's 10 men when he bent in a third goal during 11 minutes of injury time. “Dream debut! First game, victory and first goal. I cannot ask for more. Very happy and now to enjoy the moment and think about the national team,” winger Mata said on Twitter ahead of Spain's friendly against Chile on Friday and a Euro 2012 qualifier against Liechtenstein four days later. The long stoppage time came after Chelsea's Didier Drogba, brought in to partner Fernando Torres up front, was knocked unconscious and had to have extensive treatment on the pitch. Drogba was already unconscious from the punch and hit the ground awkwardly. He did not move initially as medics attended to him and was then carried off on a stretcher before being taken to hospital. He was released later. Argentine Franco Di Santo scored twice to give Wigan Athletic a 2-0 home win over promoted Queen's Park Rangers with the visitors deciding not to give Joey Barton a debut after his move from Newcastle United. Villa and Wigan are joint sixth. Promoted Swansea, still looking for its first Premier League goal, drew 0-0 with Sunderland in south Wales in a game where both sides hit the bar.
