Ian Glen Collins (23 April 1903 – 20 March 1975) was a Scottish tennis player who represented Great Britain in the Davis Cup. Collins, primarily a doubles player, never fully recovered from a broken leg in his youth but still had a lengthy tennis career. It was said that due to the contortion he made when he served he looked like a "monkey mounting a pole". He had broken his leg soon after arriving at Magdalen College, Oxford, from Harrow School. Prior to Harrow, he was educated at Sandroyd School. While at Harrow he had appeared in every Eton v Harrow cricket match from 1919 to 1922. He played cricket for the university as a batsman and in 1925 appeared in a first-class match against Middlesex. Two years later he represented Scotland in a first-class match against Ireland.