German world number four Zverev is among the favourites to win a first grand slam title at Roland Garros, despite landing Rafael Nadal in the first round.But his run to the semi-finals at the Australian Open was overshadowed when a court date was set for a trial over domestic abuse allegations, which he denies, and which is scheduled to begin in a week’s time.”At the end of the day, I do believe in the German system,” said the 27-year-old, who does not have to attend the trial in Berlin.”I do believe in the truth, as well. I have to be certain that, you know, I do know what I did, I do…