It's a legit quote by him from a now deleted forum post on his website:
“The recent incident at the tennis match has caused a disproportionate online uproar. It’s all about the famous hat, of course. Yes, I took it. Yes, I did it quickly. But as I’ve always said, life is first come, first served,” he claimed.
“In the end, chin up, hats off, less venom, more sportsmanship.”