Gilles Simon sprung a surprise on Denis Shapovalov in Cologne, where Diego Schwartzman made serene progress to round three.
The Open 13 Marseille title will be between defending champion Stefanos Tsitsipas and Felix Auger-Aliassime on Sunday.
Gilles Simon claimed his 29th career win at the Open 13 Marseille, stunning Daniil Medvedev in the process.
Daniil Medvedev proved too strong for Jannik Sinner in Marseille, while David Goffin suffered another upset.
Daniil Medvedev is next for Jannik Sinner after he overcame Norbert Gombos in straight sets in Marseille.
Daniil Medvedev was followed out of the Rotterdam Open by Stefanos Tsitsipas and David Goffin on Thursday.
Fernando Verdasco had won all four matches against Dominic Thiem but his dominance of the Austrian ended in Vienna on Thursday.
Former world number one Andy Murray was pushed all the way by Marius Copil before moving into the last four in Antwerp.
Daniil Medvedev decided not to chase a seventh straight final due to fatigue but Karen Khachanov thrilled fans at the Kremlin Cup in Moscow.
Former world number one Andy Murray recorded a straight-sets win for just the second time since August at the European Open in Antwerp.