Shaka Hislop and Steve Nicol wonder if Arsenal are too reliant on set-pieces to win the Premier League title. (2:04)Open Extended ReactionsMikel Arteta hailed David Raya's performance in Arsenal's 2-1 win against Chelsea after saying his "heart almost stopped" before the goalkeeper made a crucial stoppage time save to keep the Gunners in pole position in the Premier League title race. Spain international Raya produced a stunning full-stretch save to deny the former Manchester United winger, though, and ensure that Arsenal claimed all three points. "I thought we were good, good human beings and wanting to win, but the level they are in now is another one. "The feeling that you have to continue to win and win and win, you win so many games but it is not enough to open a gap.