Roger Federer said he has still had a "perfect" year despite suffering a surprise defeat to Borna Coric in Halle.
Borna Coric had only won two matches on grass when he arrived in Halle, but he dethroned Roger Federer on Sunday.
The ATP and the WTA should be a joint organisation, says Billie Jean King, who believes a "golden era" has driven greed in the men's game.
Despite a couple of shaky showings en route to the Gerry Weber Open final, Roger Federer is happy with how he is progressing on grass.
Denis Kudla rose to the occasion in Halle, but was unable to prevent Roger Federer from reaching yet another final.
Roger Federer acknowledged he had to "fight" to reach the semi-finals in Halle, where he will face Denis Kudla.
Roger Federer moved into the last four of the Gerry Weber Open, but it was not all plain sailing against Matthew Ebden.
Roger Federer is one of just two seeds left in the Gerry Weber Open at the quarter-final stage, having scraped through on Thursday.
Roger Federer's place at the top of the ATP rankings was challenged on Thursday, but he scraped past Benoit Paire in three sets in Halle.
There were contrasting results for two of the big names at the Gerry Weber Open, as Roger Federer progressed with ease.