Double Olympic gold medallist Nicolas Massu reached the semi-finals with a 6-2 7-6 win over Bohdan Ulihrach.

BBC: SPORT | Tennis | Henman loses out in Switzerland

And Bohdan Ulihrach of the Czech Republic came through a tough test against Germany's Rainer Schuettler to win 6-2 6-7 7-5.

BBC: Johansson hits form in Halle

An investigation was launched by men's tennis' governing body when Bohdan Ulihrach was given a two-year ban after testing positive for nandrolone.

BBC: SPORT | Tennis | Tennis drug tests questioned