[citation needed] In 2010, Donskoy played doubles with the British player Morgan Phillips at the Seville Challenger, losing in the first round.

[3][4] Donskoy entered 2013 Australian Open's main draw for the first time, reaching the third round and defeating 23rd seed Mikhail Youzhny en route.

[5][6] Consequently, Donskoy made his Davis Cup debut in Europe/Africa Zone Group I match against Great Britain in Coventry.

[citation needed] At the 2013 TOPSHELF Open held in 's-Hertogenbosch, he took out third seed John Isner in the first round and beat Robin Haase in the second to reach his first ATP Tour quarterfinals.

[citation needed] In December 2014, Donskoy decided to join the team of Boris Sobkin, coach of Mikhail Youzhny.

[13] Donskoy has very powerful, flat groundstrokes, especially his forehand, which can produce spectacular points but also a lot of unforced errors.