Australia coach Darren Lehmann has been diagnosed with deep vein thrombosis and is undergoing treatment in hospital, Cricket Australia has announced.
Lehmann was hospitalised after reporting a swollen left calf to the team's medical staff ahead of Australia's fifth one-day international against India at the Sydney Cricket Ground on Saturday.
The 45-year-old was admitted to the Royal Prince Alfred Hospital for treatment and overnight observation on the condition, which he had previously suffered in 2007.
Cricket Australia's chief medical officer Dr John Orchard said: "DVT is not an uncommon condition and it is important to diagnose it early so that it can be safely managed.
"On that basis we were fortunate to have PRP Imaging next to the Sydney Cricket Ground so we could get the scan done promptly.
"Darren is stable but he has been advised not to fly in the short term and will therefore require a lay-off before he can return to coaching."
Lehmann's wife Andrea was notified of the situation and the Australia players were told following the completion of Saturday's match, which India won by six wickets.
Michael Di Venuto, the squad's batting coach, will take charge of Australia during their upcoming Twenty20 international series against India.