Japanese top seed Kei Nishikori lost a sixth successive final on Sunday when he was defeated by Ukraine's Alexandr Dolgopolov 7-6 (7/4), 6-4 in the Buenos Aires clay-court title match.

Top seed Kei Nishikori survived a tough slog against unheralded opponent Carlos Berlocq before winning his semi-final match at the Argentina Open on Saturday.

Newly knighted Andy Murray will bid to end a run of heartbreaking defeats at the Australian Open and see off his chief rival Novak Djokovic as he enters his first Grand Slam tournament as world number one.

Novak Djokovic scraps his way into the U.S. Open final for a seventh time with a confounding 6-3 6-2 3-6 6-2 win over enigmatic Frenchman Gael Monfils.

Kei Nishikori, glad to be back on the New York hard courts where he became Asia's first men's Grand Slam finalist, reaches the second round of US Open.

World number one Novak Djokovic continues his dominance of Kei Nishikori with a 6-3 7-5 victory in the final of the Rogers Cup in Toronto on Sunday.

The sixth day of the French Open was in full flow even as its greatest champion Rafael Nadal, who has only lost twice at Roland Garros since 2005, exited with injury.