Thomaz Bellucci defeated Federico Delbonis 4-6 7-6 7-6 in the Madrid Masters qualifying round 2 on clay. The upset overturned the form book — Federico Delbonis came in leading the head-to-head 6–2, defending last year's round of 64. Thomaz Bellucci narrowed the head-to-head to 6–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-05-28 | Roland Garros | R128 | clay | Federico Delbonis | 6-1 6-3 3-6 6-1 |
| 2016-05-16 | Geneva | R16 | clay | Federico Delbonis | 6-3 6-0 |
| 2015-03-06 | Davis Cup WG R1: ARG vs BRA | RR | clay | Federico Delbonis | 6-3 3-6 6-2 7-5 |
| 2014-07-21 | Gstaad | R16 | clay | Thomaz Bellucci | 6-4 6-4 |
| 2014-04-28 | Munich | R16 | clay | Thomaz Bellucci | 5-7 6-3 6-2 |
| 2014-02-24 | Sao Paulo | SF | clay | Federico Delbonis | 6-4 6-7(5) 6-4 |
| 2013-07-22 | Gstaad | R32 | clay | Federico Delbonis | 7-5 7-6(2) |
| 2012-01-30 | Santiago | R16 | clay | Federico Delbonis | 6-2 7-5 |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.