Sam Walker took two sets off top seed Koki Niwa before bowing out of the Austrian Open in Linz.

Walker took the first set and later levelled at 2-2, but the left-handed world No 19 was able to pull clear and win their last-64 clash.

Walker’s under-21 singles run was also ended by a Japanese southpaw as Yuma Tsuboi won 3-1, though Walker saved five match points after finding himself 10-6 down in the fourth. He also missed a game point of his own before succumbing 14-12.

Click here to watch the match against Tsuboi