Overcoming a back injury and a cold, Canadian teenager Bianca Andreescu upset top-seeded Caroline Wozniacki 6-4, 6-4 and advanced to the quarterfinals of the ASB Classic

Germany teammates Angelique Kerber and Alexander Zverev each won their singles matches over France at the Hopman Cup

Andy Murray lost his second-round match less than an hour after Rafael Nadal withdrew from the Brisbane International

Rafael Nadal has withdrawn from the Brisbane International with a strained left thigh on the eve of his first scheduled competitive match of the season

Wozniacki "rusty" but gets through to 2nd round at ASB Classic

Roger Federer won the bragging rights over fellow tennis great Serena Williams as they faced each other on court for the first time on Tuesday

Andy Murray has returned to competitive tennis for the first time since September with a 6-3, 6-4 win over Australian wildcard entry James Duckworth at the Brisbane International

Rafael Nadal has found some positives out of an injury-interrupted 2018 that he wants to apply this year.

Venus Williams overcomes tough 1st round challenge, beats Victoria Azarenka at ASB Classic

Fifth-ranked Juan Martin del Potro will miss the Australian Open as he continues his recovery from a knee injury