US Open 2016: Top 5 favourites to win the Men's Singles title

RIO DE JANEIRO, BRAZIL - AUGUST 14:  Silver medalist Juan Martin Del Potro of Argentina waves during the medal ceremony for the men's singles on Day 9 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 14, 2016 in Rio de Janeiro, Brazil.  (Photo by Clive Brunskill/Getty Images)
Del Potro will be looking to continue his good form at the US Open

#4 Kei Nishikori

RIO DE JANEIRO, BRAZIL - AUGUST 14:  (EDITORS NOTE: Retransmission with alternate crop.) Kei Nishikori of Japan celebrates with the Japanese flag after winning the singles bronze medal match against Rafael Nadal of Spain on Day 9 of the Rio 2016 Olympic Games at the Olympic Tennis Centre on August 14, 2016 in Rio de Janeiro, Brazil.  (Photo by Julian Finney/Getty Images)
Nishikori will be a dark horse coming into the tournament

The World No.6 has put up a series of good performances since his fourth-round exit at Wimbledon. Nishikori made it to the final of the Rogers Cup before giving Japan its first tennis medal at the Olympics in 96 years by winning the bronze medal at the Men’s singles tournaments, beating 2008 gold medalist Rafael Nadal in the bronze medal play-off.

Nishikori will be a dangerous dark horse ahead of the US Open as his balanced play that enables him to hit powerful groundstrokes in addition to wearing out his opponent makes him a very dangerous opponent to face. If the 2014 runner-up can continue his good run of form, then he could well be a player everyone should be wary of.

What is the foot injury that has troubled Rafael Nadal over the years? Check here