Tiger Woods and Phil Mickelson don't have to worry about any golf fans yelling "Baba Booey!" during their $9 million match, because a plane flew by and wrote it in the clouds!

Woods and Mickelson are currently teeing it up at Shadow Creek Golf Course in Las Vegas as part of their highly-anticipated match.

Yelling "Baba Booey!" has become par for the course at golfing events as a tribute to longtime Howard Stern radio show producer Gary Dell'Abate.

Sources at "The Match" tell The Blast a plane flew overhead shortly after the two pros teed off, and scribbled the famous message into the sky.

We're told the crowd went nuts, especially since the event being held over Thanksgiving Weekend is a very laid back, fun match between the two longtime rivals.

Plus, Tiger's already lost $200,000 to Phil in side bets, he's got bigger things to worry about than "Baba Booey."