edley King is confident about making a comeback from injury against Arsenal this week as Tottenham attempt to salvage their season.[LNB] Spurs were knocked out of the FA Cup on Sunday at the same time as Manchester City tightened their grip on fourth place in the Premier League with a 5-1 win over Birmingham.[LNB]Harry Redknapp's men are four points behind City heading into their White Hart Lane clash against rivals Arsenal on Wednesday, with King understood to be positive about being available following a thigh injury that has kept him out since February.[LNB]The 29-year-old centre-back has been restricted to 15 league appearances this season and will undergo his usual routine ahead of matches where a decision is made on his fitness at the last minute.[LNB]His inclusion would be a huge boost to Redknapp, who had Niko Kranjcar leave Wembley in a protective boot on his left foot after the semi-final defeat to Portsmouth.[LNB]Wilson Palacios is suspended for the Arsenal clash after picking up his 10th booking of the campaign, while Aaron Lennon has been back in training following his groin problems.[LNB]Redknapp also has Younes Kaboul and Kyle Walker available after the pair were cup-tied for the Pompey defeat.