Chennai: Indian youngster Ramkumar Ramanathan will not have to face world number 12 Kevin Anderson for a place in the quarterfinals of the Chennai Open as the South African has withdrawn from the ATP event due to a knee injury.

21-year-old Ramkumar, who shocked world number 98 Daniel Gimeno-Traver in the first round on Tuesday, will now take on Russia's 164th ranked Alexander Kudryavtsev, who sneaked into the singles draw as a Lucky Loser.