Cape Town - Springbok Sevens coach Paul Treu is keen to utilise Griffons flyhalf Hansie Graaff for the remainder of the Sevens World Series.The 23-year-old caught Treu's eye playing for the Cheetahs in last weekend's inaugural Sevens Premier League in George. Graaff was named First Division Player of the Year after a stellar season with the Griffons and was also part of the Blitzbokke squad earlier this year but couldn't play due to a shoulder injury.Graaff is part of the Cheetahs' wider training group for next year's Super Rugby competition but will be called up for sevens duty should he not make the central franchise's final squad."He is the ideal player. He is nimble, can kick well, his skills are good and he's big. You don't see that often at flyhalf," Treu told Die Burger's website."For me he is the ideal payer. I had a chat with Hawies Fourie (Cheetahs' backline coach) and they will decide how their group will pan out. If he's not in their group, he'll definitely be joining us."Treu on Thursday also called up two stars of the champion Maties Sevens team to train with his squad in Stellenbosch. Stefan de Villiers and Josh Bassingthwaighte were both key members of the Maties side that won the first Varsity Sports Sevens title and after their convincing performances were picked to represent the Mighty Mohicans in the Sevens Premier League where Treu spotted them.Other good news for Treu is that Free State wing Jamba Ulengo is fit again after an injury layoff, but skipper Kyle Brown (broken ankle) will miss the rest of the Sevens World Series. Cecil Afrika (knee) and Branco du Preez (hamstring) are also doubtful for the next event in in Wellington, New Zealand in February.The Blitzbokke are currently fourth on the overall Sevens World Series log after three events. They trail leaders New Zealand by 19 points.