Andy Murray breezed through the first test of his Olympic title defence against Viktor Troicki.The London 2012 gold medalist played his first match since defeating Milos Raonic to win a second Wimbledon title a month ago, but there were no signs of rust as he eased to a 6-3 6-2 victory.The win was Murrays 13th in a row and seventh at the Olympics, and he will look to extend the run when he faces Argentinas Juan Monaco in the second round.Murray, who was due back on court later for his first doubles match with brother Jamie, was given Saturday off after carrying Great Britains flag in the opening ceremony on Friday.The heat of the first days play had been replaced by cool, blustery conditions, with the wind so strong that play on some outside courts was delayed for more than two hours for safety reasons.The crowds for the tennis have been disappointing so far, but Murray received an enthusiastic reception from the quarter-full stadium when he walked out.At 35 in the world, Troicki is one of the highest-ranked unseeded players but also a man Murray had beaten in all seven of their previous meetings.They might have faced each other three weeks ago in the Davis Cup, but both players sat out the quarterfinal, although Murray traveled to Belgrade as a supporter.He made a nervy start, dropping serve in the opening game, but broke straight back and soon began to take control.The huge dimensions of the court aided Murrays supreme retrieval skills, and although he was the aggressor, Troicki struggled to come up with winners.Some trademark Murray defence helped him break for a 4-2 lead in the opening set, and two dipping forehand passes gave the crowd something to get excited about as he broke again for 2-1 in the second.There were certainly some positive signs for Murray, who was striking the ball crisply despite the conditions and making few errors.A run of five games in a row took him to the brink of victory, and he clinched the win on his first match point after 1 hour, 23 minutes.The Scots victory made it three British singles players through to the second round after wins for Kyle Edmund and Heather Watson on Saturday, while Johanna Konta was due to play her opener later on Sunday.Murrays fellow defending singles champion,?Serena Williams, was given a battle by Australias Daria Gavrilova, but she came through 6-4 6-2.Watson was much more impressive in her second win of the day, as she and Konta eased to a 6-2 6-1 victory over Serbian pair Jelena Jankovic and Aleksandra Krunic in the first round of the womens doubles.Both Konta and Watson play a reasonable amount of doubles, but not normally with each other. 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Fremantle AFL defender Michael Johnson has been charged with assault after allegedly punching a man in a kebab shop.Johnson will appear in court in January over the incident.The 32-year-old allegedly punched a Bunbury school teacher earlier this month after being filmed with his pants around his ankles.The incident was partially captured by CCTV.Johnson is the second Docker to be charged this month with assault.Forward Shane Yarran will face court after being charged with aggravated assault for an incident earlier this month involving a family member.Meanwhile, Fremantle midfielder Harley Bennell has suffered another calf injury, but the Dockers hope hell still be available for round one of the 2017 season.Bennell failed to play a single game last year after tearing his rigght calf.ddddddddddddThe Dockers say the latest injury is to his left calf, and he will travel to Munich next month to see Dr Hans-Wilhelm Muller-Wohlfarht to try to find a solution for his soft-tissue problems.Muller-Wohlfarht, affectionately known as Healing Hans, has previously treated Collingwoods Ben Reid and Geelongs Max Rooke for soft-tissue injuries.Fremantle said Bennell suffered his latest injury last Friday at training.In another blow for the Dockers, star midfielder Lachie Neale has undergone minor surgery on his right knee.Fremantle hope Neale will be able to return to full training duties in January, and be available for round one. 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