Our American number one has been back in the first team for our last two Premiership fixtures after Neil Sullivan suffered an injury on international duty.
And it's gone well for Kasey with a decent performance at Middlesbrough and Monday's fine win against Leeds United.
He admits being back in the spotlight has been 'a pleasant surprise'.
Kasey said: "It didn't look it was going to happen again this season and it's important for me to get as many games as I can before the World Cup. It's been a pleasant surprise.
"I just want to give the manager as little excuse as possible why I shouldn't be playing.
"I've been fortunate since January to be able to pick up games here and there fairly consistently so it hasn't been two or three months since I last played. If I can pick up a few more, fantastic.
"This is a big game for us and if we can disrupt their title chances it would mean so much for our fans. We know that."
Kasey Keller is aiming for his first taste of a north London derby at Highbury.