Federer made it three figures in trophies won when he beat Stefanos Tsitsipas in the final of the Dubai Tennis Championships.
Roger Federer won his first title back in 2001, winning in Milan.
He is the leading male when it comes to Grand Slam victories, having won 20 across a glittering career.
And after beating Tsitsipas, Federer posted a message on Twitter to his army of fans.
Alongside a picture of himself with the trophy from Dubai, Federer wrote: “Made it to 100! Thank you for all your support.”
Federer now sits nine titles behind Jimmy Connors, who won 109 tournaments during his career.
The Swiss star had been stuck on 99 since October but beat Tsitsipas 6-4 6-4.
And the 37-year-old maintained that as long as he is enjoying his tennis and the family is happy, he will continue playing.
Federer said: “I’m so happy I’m still playing.
“I won my first title in Milan. It’s been a long wonderful journey, it’s been great and I wouldn’t do it any differently.
“I’ve loved every minute. Of course it is tough to be on the road and away from your friends but it was all very worthwhile.
“We’ll see how much more I’ve got left in the tank. But reaching 100 is an absolute dream come true for me.
“We are living in a day and age where all the records have to be shattered. Not for me.
“I’m just happy I’m still healthy. I’m happy I have such a wonderful team, family. They all supported me for so long so I can’t thank them enough.
“If I reach milestones like this along the way it’s wonderful, but I’m really not here to shatter all the records. I think what Jimmy did was an unbelievable achievement. He should be proud of that, I’m proud of other things I’ve done.
“It was a very special evening playing Stefanos and seeing the future coming up in the tennis game. It’s part of this whole journey. It’s not about breaking every single record to be quite honest.”