Four members of Australia's Olympic women's water polo squad have been taken into quarantine shortly after arriving in Rio after falling ill.

The players are suffering from a virus and will be isolated from the rest of Australia's athletes.

"They haven't had a good couple of days," said Australia's chef de mission Kitty Chiller.

"Their flight was delayed out of Rome and four of the athletes had contracted gastro."

They will be kept at a building that is normally reserved for team officials.

"Dr David Hughes will keep a close eye on them and they'll stay in there for 48 hours until after they're all cleared," Chiller said.

The team's first group match is against Russia next Tuesday.

Aussie teams touch down

The Stingers were among several Australian arrivals just four days out from the opening ceremony.

The Boomers touched down ahead of their bid for a medal in men's basketball, while Thanasi Kokkinakis lost a bag of tennis racquets en route from Dubai.

"They told me it should arrive late tomorrow afternoon so it's a bit disappointing," Kokkinakis said.

Loading

The Rio Games will be the 20-year-old's first tournament in ten months after recovering from shoulder surgery.

He'll be joined on Australia's tennis team by sisters Arina and Anastasia Rodionova.

They have received a late call-up to the women's doubles draw after the withdrawal of another pair.

The Rodionovas are the ninth set of siblings in the now 420-strong Australian squad.