Top-seeded Steve Johnson was upset in the quarterfinals of the Hall of Fame Tennis Championships on Friday, losing to fellow American and No. 8-seeded Donald Young 6-2, 6-3.
In other quarterfinal play, second-seeded Ivo Karlovic of Croatia reached his third consecutive semifinals on Newport's grass courts, beating Switzerland's Marco Chiudinelli 6-3, 6-4.
Karlovic lost in the final the last two years.
Third-seeded Gilles Muller of Luxembourg rallied past France's Adrian Mannarino, the No. 6 seed, 2-6, 6-1, 6-2.
The semis will be played on center court after enshrinement ceremonies for the 2016 class into the International Tennis Hall of Fame. Marat Safin and Justine Henin head this year's class.