CRICKET: Eighteen-year-old Surrey opener Dominic Sibley has become the youngest double centurion in English county cricket after hitting 220 not out against Yorkshire at the Oval. The schoolboy, aged 18 years and 21 days, batted all day and shared a 236-run stand with South African Hashim Amla (151) on Thursday to help Surrey to a total of 572-4. His maiden first class century arrived off 301 deliveries, making him the youngest Surrey player to reach that landmark. The previous record was set by Jack Crawford in 1905 at the age of 18 and 257 days.

TENNIS: Venus Williams was denied a chance to better her world record for fastest serve in women’s tennis in absence of proper measuring technology at the Pan Pacific Open in Tokyo. Williams blasted a 209km-per-hour serve during Thursday’s 6-3 6-7 (4) 6-3 win over Canadian teenager Eugenie Bouchard in the quarter-final match. The WTA uses IDS radar guns to measure service speeds but they are not deployed in Tokyo, the governing body said in an email response to Reuters. It meant that the 33-year-old American’s serve of 207.6 km per hour, hit during the 2007 US Open, stands as the fastest serve in women’s tennis till date.

RUGBY UNION: Stephen Larkham has been named in a caretaker coaching duo for the ACT Brumbies with fellow assistant Laurie Fisher in the wake of Jake White’s sudden resignation, but the former Australia flyhalf would like to take on the head role full-time. Larkham has been the team’s attack coach for the past three seasons, helping the Canberra-based side to the final of this year’s Super Rugby competition. “You’re never really sure if you’re ready but my rugby knowledge is pretty good and I played a lot of rugby under some really good coaches,” he said.