Martin Skrtel has again praised Sotirios Kyrgiakos. Kyrgiakos is set to return against Stoke this afternoon after missing the Reds' last two games with tonsilitis. Skrtel has welcomed the Greek's return and believes he adds another dimension to Liverpool's attacking play from set-pieces. "I think he's dangerous for every single set play, every single corner and free-kick. I think he's absolutely No.1 in the air at our club and maybe in the Premier League," said the centre-back. "He's showed he's a good player and that he could score a lot of goals for Liverpool. "I try to do it but it's not easy because our opponents always try to look after the centre-backs. I've been a bit unlucky but I'll try to improve and try to be more dangerous."