We've got two more tips for you from our tennis expert Scott Ferguson for Thursday's action at Roland Garros.
Dominic Thiem vs Karen Khachanov
The world no.4 from Austria was in fine form on Monday against Gael Monfils, fine-tuning his performance into his first straight sets victory of the tournament.
Seeking his fourth semi-final appearance in as many years, he has to overturn a 0-3 h2h record against the 6'6" Russian, Karen Khachanov.
Each of those three meetings came at the back end of 2018 on hardcourt, including two in the Abu Dhabi exhibition, which could be argued isn't a full-blown event and thus results shouldn't necessarily be taken at face value. Hardcourt provides a significant advantage for Khachanov with his height and raw power; assets which will be blunted here.
The Russian was in commanding form in his victory over Juan Martin del Potro, stepping up to the baseline whenever possible and unleashing ridiculous power in his forehand especially. Not only will it be a fitter and more agile opponent across the net this time, Thiem hits considerably more topspin than the the lanky Argentine and will endeavour to pin Khachanov deep, negating his early power.
A tight battle early with plenty of big forehand slugging is predicted, before Thiem eventually takes control of the match.
Novak Djokovic v Alexander Zverev
World no.1 Novak Djokovic seeks the rare opportunity to hold all four Grand Slam titles at the same time, for the second time in his career, and faces a rare player who holds a positive record against him in Alexander Zverev.
The German leads the slate 3-2 including one exhibition match on grass back in 2015 but even ignoring that, the record is very close. Zverev won their one clash on clay two years ago in Rome.
Djokovic undoubtedly has the ability to find an extra gear when it matters, particularly at the business end of a tournament. In New York and Melbourne, he did not drop a set from the quarter-finals on.
So far this fortnight, Djokovic has yet to be tested, cruising through without conceding a set, even against two players ranked in the 40s.
In contrast, Zvevev has overcome two seeds in Dusan Lajovic (30) and the arguably the hottest player of the clay season, Fabio Fognini (9).
Djokovic has been beaten in the quarters two years in a row, he'll be desperate not to do it again, even more so when holding all four GS titles at once is within his grasp.
Zverev is the new upstart on the verge of breaking through - his quarter-final exit last year is his best major tournament result to date, and ranked five, the expectations for him to take the next step soon are high.
Zverev definitely has a chance here but I'm expecting Djokovic to raise his game under pressure. On a day where rain interruptions look highly likely, a match of twists, turns and momentum shifts is on the cards.