The 24-year-old signed for Liverpool from Arsenal in a reported £35millon deal just before the transfer deadline, and Henderson is delighted to have his fellow England international team-mate on board.
There have been suggestions that Oxlade-Chamberlain has not fulfilled his potential while with the Gunners, but Henderson says Klopp will now help him do that.
“You’d have seen him [Klopp] on the sidelines, he’s very passionate, what you see is a fantastic manager and I think he will help Alex a lot,” Henderson said.
“He will help him develop as a player and hopefully you will see even more good things from him.
“I’m delighted he’s signed for Liverpool, but, at the end of the day, we are with England and our focus has got to be on the game here [against Slovakia] and after Monday then I’m sure we can start focusing on Man City and getting him into Melwood for his first session and stuff like that.”