Nadal practices in Melbourne amid Australian Open fitness concerns

Amid fitness concerns, world number one Rafael Nadal practiced in Melbourne ahead of the Australian Open.

World number one Rafael Nadal's participation in the Australian Open remains uncertain as he continues to recover from a knee injury.   -  Getty Images

Rafael Nadal arrived in Melbourne and practiced on Friday ahead of the Australian Open. The world number one is under an injury cloud ahead of the year's first Grand Slam after withdrawing from the Brisbane International.

However, the 16-time Grand Slam champion looked in decent shape as he practiced in warm conditions on Rod Laver Arena. The sight of the Spanish superstar would surely have been a boost to Australian Open officials.

Serena Williams, Andy Murray and Kei Nishikori have already withdrawn from the year's first major.

READ: Australian Open confident Djokovic and Nadal will play in Melbourne

Nadal (knee) and Novak Djokovic (elbow) are also under injury clouds. The injury saw Nadal withdraw from the ATP Finals in London late in 2017 in the last competitive tournament he played.

Nadal and Djokovic are due to play the Tie Break Tens in Melbourne on Wednesday.