Boris Becker is "lost for words" after a vote changed the Davis Cup format, while fellow German great Michael Stich says a tradition has been buried.
Juan Martin del Potro has made it through to his fourth consecutive last 16 at the Cincinnati Open with a 6-2 6-3 win over South Korea's Chung Hyeon.
Australian Ajla Tomljanovic has succumbed to world No.1 Simona Halep following the resumption of their tight second-round clash in the Cincinnati Open.
Australia's Davis Cup World Group playoff with Austria appears redundant following the International Tennis Federation's radical overhaul of the competition.
A controversial revamp of the Davis Cup, spearheaded by Barcelona footballer Gerard Pique, has been voted in by the International Tennis Federation.
Australia's Ashleigh Barty has beaten Estonian qualifier Kaia Kanepi to reach the Cincinnati Open third round, joined by US Open champion Sloane Stephens.
Canadian young gun Denis Shapovalov has wowed fans with an insane piece of skill straight out of the playbook of the great Roger Federer.
Nick Kyrgios has left the world of tennis stunned with one of the ballsiest plays imaginable, while he was match point down in Cincinnati.
Greek sensation Stefanos Tsitsipas is set to make his Hopman Cup later this year, joining Roger Federer and Alexander Zverev in Perth.
International Tennis Federation president David Haggerty is optimistic the format of the 118-year-old Davis Cup will be overhauled this week.
Ashleigh Barty has won her first-round match at the Cincinnati Open while Petra Kvitova defeated Serena Williams in a high-quality round of 32 encounter.