Arsene Wenger insists his Arsenal players believe they can overturn a 3-1 deficit against Monaco in the Champions League on Tuesday, but the Gunners manager is less confident about their chances of winning the Premier League.

Goals from Olivier Giroud, Aaron Ramsey and Mathieu Flamini secured a 3-0 win over West Ham that left Arsenal in buoyant mood ahead of their tricky last 16 second leg trip to Monaco in midweek.

Manchester City manager Manuel Pellegrini believes the Premier League title race is not over despite a damaging 1-0 defeat to relegation battlers Burnley at Turf Moor.

Burnley forward George Boyd scored the decisive goal with a superb half-volley to give the Clarets a deserved victory against the reigning champions on Saturday.

Tyler Zeller had 18 points and seven rebounds Saturday as the Boston Celtics ended Indiana's seven-game NBA winning streak with a 93-89 victory over the Pacers.

Avery Bradley, Jae Crowder and Brandon Bass added 16 points apiece for the Celtics, who have won four in a row and six of their last seven games.

Sergey Kovalev stopped former champion Jean Pascal in the eighth round on Saturday to retain his trio of light heavyweight world titles.

The unbeaten Russian improved to 27-0 with one drawn and 24 knockouts, retaining the World Boxing Association, World Boxing Organization and International Boxing Federation crowns.

World champion Lewis Hamilton grabbed pole position for the Australian Grand Prix by six-tenths of a second from Mercedes team-mate Nico Rosberg on Saturday.

Hamilton set the pace with 1min 26.419sec midway through the final qualifying shoot-out and he lowered the time to 1:26.327 in the final seconds.

Serena Williams won her first match at Indian Wells since 2001 on Friday, beating Monica Niculescu in straight sets to end her 14-year self-imposed exile from the California desert event.

World number one Williams earned the 7-5, 7-5 victory in two hours, three minutes in front of a crowd of about 14,000 on center court of the Tennis Garden stadium.

Louis van Gaal admitted on Friday that he has no answers to explain Radamel Falcao's failure to make his mark at Manchester United.

Falcao's troubled spell with van Gaal's side hit a new low in midweek when he lasted just 71 minutes of an under-21 game against Tottenham, a demotion that was intended to improve the on-loan Monaco striker's fitness and sharpness.

A judge in the northern province of Navarre indicted the five, who were named as Jorge Molina and Jordi Figueras of Betis Seville, Sergio Garcia, the captain of Espanyol, Patxi Puñal, formerly of Osasuna, and Antonio Amaya, a former Betis player who now plays for Rayo Vallecano.

"They've all been charged over possible match-fixing," a court spokesman confirmed to AFP.

Crisis-hit Serie A club Parma have been docked a further two points and seen former president Tommaso Ghirardi and club official Pietro Leonardi handed four-month bans by league disciplinary officials on Friday.

Parma, who could be declared bankrupt at a hearing scheduled for March 19, were docked a point in December in relation to unpaid salaries from July, August and September 2014.

Joachim Loew has extended his contract as coach of world champions Germany until the 2018 World Cup in Russia, the German football federation (DFB) announced on Friday.

The 55-year-old Loew's previous contract took him through to Euro 2016, but he said the chance to extend the deal was not one he was going to allow to get away.