Milos Raonic holds the record with 47.
See all of this week's rankings movers and shakers on the ATP Tour.
The Spaniard enters the draw with a 12-match winning streak on grass.
These players made it to the top of the mountain, without making it to the top of the mountain.
Only one player has achieved the feat more than once.
15 women have achieved the feat, but only one has done it more than once.
Four of the world's Top 5 players are in the draw in Berlin, with Coco Gauff as the top seed.