<p>Berrettini, a former world ‌number six, has struggled with fitness issues and missed eight ‌of the 18 Grand Slams since his runner-up finish to Novak ‌Djokovic at Wimbledon five years ago.</p><p>On Saturday, the Italian prevailed in a gruelling five-hour battle with Argentina's Comesana, winning 7-6(3), 5-7, 6-7(4), 6-4, 7-6(13).</p><p>"I know what it takes to go deep ‌in a slam, but at the same ⁠time, it's also true that ‌I haven't been deep in a slam for a long time," ​Berrettini told reporters after his win.</p><p>"<strong>Coming into the tournament, I didn't have the confidence, like I had ​a couple of years ago, but at the same time, I feel like I have built this confidence up</strong>.</p><p>"<strong>I'm ⁠in the fourth round, ​second week of Paris, means that I can go deep. I'm playing well. Today was, I think, a high-level match. My weapons are working, physically I'm there, and fingers crossed</strong>."</p><p>After ‌the match, Berrettini appeared to be holding back tears as he waved to the crowd at Court Simonne Mathieu.</p><p>"<strong>I doubted about myself a little bit too much, I think, in the last months and years</strong>," the 30-year-old said.</p><p>"<strong>Even though I had unbelievable support from my family, from my friends, from my team, and everybody kept telling me that I still had it in me. Sometimes I just have ‌to confess that I thought that I couldn't come back, ​I couldn't feel good on court again</strong>.</p><p>"That's why I ‌was emotional, because I proved to myself one more time that I can do this, I can do it well, I can fight, I can enjoy my time on court."</p><p>Berrettini next faces another Argentinian in Juan Manuel ⁠Cerundolo, who beat world ⁠number one Jannik Sinner ‌in the second round.</p>