However, the former England international also admits that if Cech were to leave the Emirates at the end of the season, Arsenal could do a lot worse than to replace him with Manchester City reject, Joe Hart.
Speaking to talkSPORT, Seaman claimed Cech was still a top goalkeeper despite his costly mistake against his former side on Saturday.
“It is a surprise. For me, this season he has been really consistent. He has had made some big saves.”
He added, “You look at the goals people are questioning and I don’t see a lot wrong.”
Yet, if Joe Hart was to be made available, Seaman believes Arsenal should jump at the chance to sign the experienced shot-stopper.
“I think a lot of clubs will go for Joe because he is a quality goalkeeper and it was a massive shock in the summer when he left Manchester City.”
“If the situation arises where Arsenal are looking for a goalkeeper then I can’t see a better replacement than Joe Hart.”
Seaman made over 400 appearances for the Gunners, winning three league titles and four FA Cups.