In 1903, he reached the doubles final with L. Harry Waidner at the U.S. National Championships (now known as the U.S. Open) which they lost to the English brothers Reginald and Laurence Doherty in three close sets, 11–9, 12–10, 6–4. The following year, 1904, Collins again reached the doubles finals, this time partnered with Raymond Little and lost in five sets to Holcombe Ward and Beals Wright. In singles, he reached the semifinals twice, in 1899 and 1905, and the quarterfinals in 1902.