Croatian teenager Marin Cilic hit top form of ahead of this month's Davis Cup tie in Great Britain with victory over top seed Nikolay Davydenko in Beijing.
Cilic has already shown he can play well on grass
The 18-year-old is likely to line up with Ivan Ljubicic against Andy Murray and Tim Henman in the singles rubbers at Wimbledon on 21-23 September.
And he warmed up with his first win over a top-10 player, beating Davydenko 6-3 6-4 at the China Open on Thursday.
Cilic also beat Henman in the first round at Queen's Club in June.
The 6ft 5in teenager has won two titles on the challenger circuit this year and risen from 170 in January to a current ranking of 117.