US Indoor Championships: Kei Nishikori edges out Benjamin Becker
Kei Nishikori overcame a slow start to topple Benjamin Becker at the US National Indoor Tennis Championships.
Last Updated: 13/02/14 8:21am
Nishikori had issues with his serve in the first set and Becker broke him twice, but the world No 16 regained his composure to register a 6-4 6-4 victory.
Nishikori, whose third ATP Tour title came at Memphis 12 months ago, will now tackle Alex Bogomolov Jr in the quarter-final.
Bogomolov upset home hope Ryan Harrison 6-3 2-6 6-2 in their second round clash.
Denis Kudla and Michael Russell have also progressed to the last eight after coming through all-American ties.
Kudla, who qualified for the main draw, routed Donald Young 6-1 6-1, while Russell was forced to dig deep for his 6-2 7-6 (7-5) win over Tim Smyczek.
Fellow American Jack Sock was a convincing 6-2 6-1 victor over Jiri Vesely.