World No.1 Novak Djokovic's latest victory on home soil has him tied fifth with Guillermo Vilas for most match wins in the Open era with 951.
Djokovic swept past lucky loser Mats Moraing 6-2 7-6 (7-4) to book his place in the quarter-finals of the Belgrade Open.
Improving his record to 17-3 on the season, Djokovic now sits behind only Jimmy Connors, Roger Federer, Ivan Lendl and Rafael Nadal on the list of the game's greatest winners.
"With this win I managed to put my name in another history record book," Djokovic said.
"Obviously being in the same conversation with Vilas and the legends and greats of our game, it makes me really fulfilled and very joyful."
Djokovic, who turned 34 on Saturday, was returning to action after defeat to Nadal in the final of the Rome Open with the Serbian stepping up his preparations for the French Open.
"I was twice a break up in the second set, so I maybe could have finished out the job earlier," Djokovic said, after his win over German Moraing.
"But credit to him for fighting, for playing really well, for playing very courageous, very bold tennis."
Djokovic will take on Argentina's Federico Coria for a spot in the last four.
In other results on Tuesday, Croatian qualifier Alex Molcan crushed Pedja Krstin 6-0 6-0 to secure the first double-bagel of 2021 on the ATP Tour.
Molcan will face Fernando Verdasco next after the veteran Spaniard accounted for fourth-seeded Frenchman Adrian Mannarino 7-6 (7-4) 6-0.