A pair of canceled Czechs

Czech tennis stars, world No 8 Tomas Berdych and No 16 Karolina Pliskova, on Saturday joined the growing list of players pulling out of the Rio de Janeiro Olympics due to concerns over the Zika virus.

Their decision came just a day after top 10 stars Milos Raonic of Canada and Simona Halep of Romania withdrew over similar health fears.

"I am very sorry to announce that I will not take part in this year's Summer Olympic Games in Rio de Janeiro," Berdych, the 30-year-old Wimbledon semifinalist, said on Twitter.