Robbie is gunning for his 100th Spurs goal and has no qualms about getting it against Roy's Sunderland.
He said: "You just respect someone who was such a high-profile player. I was 17, just getting into the Irish set-up and there was Roy Keane to look up to and respect.
"He's done a great job with Sunderland. Hopefully it won't be so good for him Saturday."