World number Novak Djokovic is through to the US Open semi-finals, after Jo-Wilfried Tsonga suffered a knee injury in their quarter-final match to hand the Serbian another walkover.
The defending champion had cruised into a two set lead (6-3 6-2) against the Frenchman, who required medical attention to his left knee after falling a double break down in the second set, before he had to pull out just two minutes into the third set
It is the third time at this year’s tournament that Djokovic has been handed victories due to injury with Jiri Vesely pulling out before the second round and Mikhail Youshny lasted just 30 minutes due to a leg injury in round three.
It will be up to Gales Monfils to stop the 12 time grand slam winner reaching the final, as the Frenchman comfortably booked his place in the final four with another straight sets win against compatriot Lucas Pouille.
22-year-old Pouille superbly knocked out two-time champion Rafael Nadal in a five set thriller on Sunday but that seemed to take a lot out of the Frenchman, as he proved no match for Monfils on Tuesday evening.
The tenth seed came into the match without having dropped a single set at Flushing Meadows this year and he kept that record in tact to beat 24th seed Pouille 6-4 6-3 6-3.to reach his first grand slam semi-final since the 2008 French Open.
In women’s action, Angelique Kerber remains on course for her second grand slam title of the year as she sent last year’s beaten finalist Roberta Vinci packing to reach the semi-finals.
The 33-year-old Italian had served for the opening set but she spurned her chance to take the lead as Kerber fired back to win the opening set before winning six consecutive games to bag a 7-5 6-0 victory.
It was not all easy for the Australian Open champion as she was broken three times in the opening set but she responded every time against Vinci, who failed to repeat her heroics from last year when she stunned Serena Williams in the semi-finals.
Kerber will face Caroline Wozniacki in the semi-finals, as the Dane continued her resurgence as the former world number one saw off injury-hampered Anastasija Sevastova.
The Latvian picked up an ankle injury in just the second game after falling awkwardly, as Wozniacki cruised to take the opening set. She led 3-0 in the second before Sevastova won her first game, but the result was never in doubt for Wozniacki.
Wozniacki has plummeted to 74th in the rankings following poor form and injuries but the 26-year-old has been back to her very best at this year’s US Open as she comfortably saw off Sevastova 6-0 6-2 to reach the final four.