Grigor Dimitrov out of Washington hard-court tournament

Wimbledon semi-finalist Grigor Dimitrov of Bulgaria has withdrawn from the Citi Open hard-court tournament, citing the flu and a sinus infection.

Dimitrov's decision was announced on Sunday, a day before play begins.

Dimitrov is a top-10 player who would have been seeded third at the tournament, part of the North American circuit of warm-up events ahead of the US Open.

Eugenie Bouchard, the women's runner-up at Wimbledon, withdrew from the Citi Open earlier.