Serbia's world number one Novak Djokovic won a fifth Australian Open title Sunday, beating Britain's Andy Murray in four sets in the final.

Djokovic won 7-6 (7/5), 6-7 (4/7), 6-3, 6-0 in 3hr 39min for his eighth Grand Slam title to stretch his formidable record on the Melbourne hardcourts to winning five from five finals in eight years.

Play was held up during the men's final at the Australian Open on Sunday when a banner was unfurled protesting against the treatment of refugees, with at least one person jumping on court.

Security officials quickly encircled Novak Djokovic and Andy Murray during a changeover in the second set with the Serbian world number one leading 4-3.

With her name freshly engraved onto the Australian Open trophy, Serena Williams feels she can play on indefinitely and is intent on increasing her tally of 19 Grand Slams.

The American great, 33, scoffed at talk of retirement after shooting down Maria Sharapova in straight sets to win her sixth title at Melbourne Park, becoming the oldest woman to ever lift the trophy.

Chelsea striker Diego Costa accepted he was "no angel" but insisted he had not done anything wrong in the incident that led to him receiving a three-match ban.

The 26-year-old was suspended for three games by the Football Association, after being found guilty of violent conduct when it was ruled he had deliberately stamped on the ankle of Liverpool's Emre Can during Chelsea's League Cup semi-final leg victory on Tuesday.

Roma's hopes of a first Serie A title faded further on Saturday after a fourth consecutive draw, 1-1 at home to Empoli, to leave Juventus six points clear before their trip to Udinese.

The Giallorossi's dreams of a first scudetto since 2001 were dented significantly by last week's draw away to Fiorentina which allowed Juve to open up a seven-point gap on Rudi Garcia's men.

Mauricio Pochettino is hopeful Harry Kane will remain at Tottenham for "a long time" after the forward reached 20 goals for the season with a brace in the 3-0 win over West Bromwich Albion.

Kane's double and another sublime Christian Eriksen free-kick helped Spurs dominate at the Hawthorns on Saturday as they moved within two points of fourth-placed Southampton, who play Swansea on Sunday.

Chelsea manager Jose Mourinho kept his thoughts to himself after his side consolidated their position atop the Premier League with a 1-1 home draw against nearest rivals Manchester City.

Aggrieved by striker Diego Costa's three-game ban for treading on Liverpool's Emre Can -- an incident he felt was unfairly amplified by the media -- Mourinho has imposed a personal press blackout at Stamford Bridge.

Liverpool manager Brendan Rodgers has cautioned about placing too much expectation on Daniel Sturridge following his goalscoring return to action in a 2-0 win at home to West Ham.

After Raheem Sterling put Liverpool ahead, second-half substitute Sturridge doubled the Merseysiders' lead after five months out with thigh and calf injuries.

A National Football League season marred by scandal culminates Sunday with Super Bowl 49 as Seattle and New England meet in a clash that has the makings of a classic.

Each team can cement a place in Super Bowl lore with a victory.

Kevin Love scored 14 points and grabbed a game-high 17 rebounds in his triumphant return to Minnesota as the Cleveland Cavaliers ripped the Timberwolves 106-90 for their 10th consecutive NBA victory.

Star forward Love had made it clear he wanted to leave Minnesota and he was traded to Cleveland last August in a three-team deal that helped give the Cavaliers the support needed to become a contender after the signing of four-time NBA Most Valuable Player LeBron James.