Jiri Lehecka on to Madrid semis after Daniil Medvedev retires

(Photo credit: Taya Gray/The Desert Sun / USA TODAY NETWORK)
Russian No. 3 seed Daniil Medvedev retired after one set of his Mutua Madrid Open quarterfinal match Thursday in Spain, sending Czech No. 30 seed Jiri Lehecka to the first ATP Masters 1000 semifinal of his career.

Lehecka won the first set 6-4, but not before Medvedev began having issues with his upper right thigh. Medvedev sought treatment on his leg while lea