Casper Ruud dropped just four games as he made a fine start to his Geneva Open title defence, but Denis Shapovalov fell on Wednesday.
There were mixed fortunes for the top seeds on Wednesday as Karolina Pliskova prevailed in Strasbourg, but Garbine Muguruza fell in Rabat.
Casper Ruud sets out to defend Geneva crown.
Rangers and Eintracht Frankfurt fans have clashed in ugly scenes ahead of tonight's Europa League final in Seville.