Ana Ivanovic's coach Nigel Sears collapses during match, taken to hospital

Ivanovic was leading 6-4 1-0 when play had to be halted as Sears was treated by medical staff in the stands on Rod Laver Arena.

Sears, the father-in-law of Andy Murray - who was playing his third-round match against Joao Sousa on the neighbouring Margaret Court Arena at the same time - was conscious and appeared to be speaking to medical staff as they treated him before he was taken out of the stadium on a stretcher and then to hospital for tests.

Andy Murray's brother Jamie told reporters that Sears was "conscious, talking and sitting up".

Following the conclusion of Ivanovic's match, which she lost in three sets, it emerged that Sears had been asking for updates on the result and had requested a TV in his hospital room.

Both Ivanovic and Murray left Melbourne Park immediately after their matches, reportedly in order to go and see Sears in hospital.

Tournament organisers said they did not have any details of what had necessitated Sears to require treatment.

It was the second time this tournament that one of Ivanovic's matches had been suspended due to an incident in the stands.

Her second round match against Anastasija Sevastova was held up for 26 minutes when a woman fell in the stands at the same showcourt.

ESPN reported both her and Keys had been given the option to postpone the match.