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World number two Serena Williams continued her quest to surpass Steffi Grafs Open era record of 22 Grand Slam titles as she booked her place in the semi-finals of the season-opening Australian Open following straight-sets victory over British star Johanna Konta here on Wednesday. Serena Williams served up 10 aces and thumped 25 winners to register a 6-2, 6-3 triumph over Johanna Konta in a one-sided quarter-final.Serena is bidding to clinch her seventh Australian Din976 Open title, which would assure her of a return to world number one in place of Germanys Angelique Kerber.Read: Federer, Serena not a part of IPTL 2016With the win, Serena has joined her elder sister Venus in the last four of the womens singles event, where she will lock horns with 34-year-old Croatian Mirjana Lucic-Baroni for a place in the summit showdown. Related StoriesSerena Williams gets engaged to Reddit co-founder OhanianSerena Williams back with rapper Common?.Read: Selfish Serena says engagement hasnt sunk inSerena, who lost last years Australian Open final to Kerber, came into the opening Grand Slam of the year with doubts over her form as she barely played since the US Open last September due to injury.The American tennis star served up 10 aces and thumped 25 winners to register a 6-2, 6-3 triumph over Konta in a one-sided quarter-final contest that lasted one hour and 15 minutes at the Rod Laver Arena.Serena Williams, who lost last year's Australian Open final to Angelique Kerber, came into the tournament with doubts over her form