Bryan brothers announce retirement days ahead of US Open

Sandgren wins maiden ATP title in Auckland

Federer and Bencic retain Hopman Cup for Switzerland

Del Potro back on court following knee fracture

Capital gains for Zverev as he secures last-four spot in London

Thiem blasts past Nishikori to keep semifinal hopes alive

Murray to make return from injury in Brisbane

Nadal's hard-court woes continue with ATP Finals withdrawal

Djokovic proud of 'amazing five months' after Khachanov upset

Djokovic sets up Khachanov showdown after Federer thriller

Federer punishes wasteful Fognini to remain on course