Arsenal manager Arsene Wenger criticized Portsmouth's poor tactics after their scoreless draw on Wednesday night. "Credit to Portsmouth, they made it difficult for us. They played in one half of the pitch. I don't think offensively they had a special performance, they played with 10 players at the back and in the end they got the maximum they could from this kind of game,'' the Frenchman told Skysports.com. The Gunners lost the top of the table to Manchester United who thrashed Sunderland 4-0. "It was a surprise. Their whole midfield was focused on defending and we were not creative enough to find an opening.” Manchester United clinch the summit of the Premier League with 45 points just one ahead of Wenger's men.