Mikael Ymer is also in the Next Generation playoffs, a closing competition for the ATP tour's greatest talents, in which the seven best-ranked players who are 21 years old (plus an eighth entered via wild card) participate.
Ymer defeated Frenchman Ugo Humbert, 55th in the world rankings, with the numbers 4-3, 1-4, 4-2, 4-1.
ATP sees the Next Generation endgame as a chance to test some new formats and rules. One of these is that the sets are only played to four to increase the number of important balls in the match and that the match is played in the best of five sets.
The victory gives the Swede SEK 310,000. Ymer secured SEK 540,000 by participating only in the playoffs.
Tomorrow, American Frances Tiafoe, ranked 47th in the world, awaits.