Maximilian Marterer, 26, is a former top-50 player. The German hasn’t been able to repeat those results in the past two years, not returning to the top-150 or scoring an ATP since Kitzbuhel 2020. Marterer has posted six major wins.so far, with three of them coming at Roland Garros 2018, when he reached the fourth round to set up the matchup against legend Rafael Nadal. The Spaniard needed two and a half hours to beat the German 6-3 6-2 7-6, struggling in the third set before sealing the deal in a tie-break.Ranked 214th, Mar …