UK No.1 Adam Glynn of Dorset eased through the first round of the ProAktive 16 and unders cup without dropping a game to Caleb Dyer.
Sabrini Federici UK No.3 girl at 16U also passed through the first round unscathed with a 6-2 6-2 win against Abigail Amos.
Doncaster players Matthew Clegg and Vishnu Panikar progressed through their first round matches in the 12 and Under category with wins against Joseph Eaton of Tickhill (6-1 6-0) and Henry Zeris of Lancashire (6-0 6-0) respectively.
In the girls 12 and Under, Doncaster player Elizabeth Morris narrowly lost a close tussle with Lois Page of Durham 6-4 6-2.
Edward Morris and Luis Sylvester won their 18 and Under doubles quarter-final against Staffordshire pairing Adam Twigg and Ryan Baxter in a third set tie breaker.
But they crashed out of the semi-finals 4-2 4-2 to Northumberland pair John Boden and Martin Slater in a thrilling match played in great humour.