Samuel Groth OLY (born 19 October 1987) is an Australian former professional tennis player and politician. Sitting as a state MP in Victoria, Groth represents the Liberal Party in the seat of Nepean. His highest ATP singles ranking was World No. 53, which he reached in August 2015. His career high in doubles was World No. 24, reached in February 2015. Groth's best singles result was a semi-final appearance at the 2014 Hall of Fame Tennis Championships. He hit the fastest serve on record at 263 km/h (163.4 mph) in 2012 at the ATP Challenger in Busan. Prior to his political career, he worked for the Nine Network's tennis broadcasts and as a host on Postcards.