Liverpool goalkeeper Pepe Reina accidentally pushed the ball into his own net to hand Arsenal a 1-1 draw at Anfield in their Premier League opener on Sunday. The ball rebounded off Reina after Marouane Chamakh’s header hit the goal post in the 90th minute to cancel out David Ngog’s powerful strike. “We defended very well and it’s unfortunate to give a goal away at the end,” Liverpool defender Jamie Carragher said. “It doesn’t matter if you’ve got 10 or 11 (players), and we’re very disappointed it’s not even a goal where they’ve used their man advantage.” The equalizer came after Liverpool overcame Joe Cole’s sending off at the end of the first half to take the lead at the start of the second when Ngog beat Manuel Almunia at his near post. Laurent Koscielny, who was the victim of Cole’s red-card lunge, was sent off himself in second-half injury time after being shown a second yellow card for handling. “I believe we got a deserved equalizer because I couldn’t see Arsenal losing a game like this without being deeply hurt,” Arsenal manager Arsene Wenger said. This was Roy Hodgson’s first significant challenge as Liverpool manager, having replaced Rafa Benitez after…