Tennis-Halle Open men's singles quarterfinal results

June 13 (Infostrada Sports) - Results from the Halle Open Men's Singles Quarterfinal matches on Friday

4-Kei Nishikori (Japan) beat Steve Johnson (U.S.) 6-1 7-6(4)

2-Roger Federer (Switzerland) beat Lu Yen-Hsun (Taiwan) walkover

Philipp Kohlschreiber (Germany) beat Dustin Brown (Germany) 6-4 5-7 7-6(16)

Alejandro Falla (Colombia) beat Peter Gojowczyk (Germany) 7-6(4) 7-6(2)