Completed the following sentence: In 2015, Serena Williams decided to start her season at the exhibition event in Perth, at the
<unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Williams ended her 14-year boycott of the BNP Paribas Open but withdrew before her semifinal match.<unk> Williams ended her 14-year boycott of the BNP Paribas Open but withdrew before her semifinal match. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Williams returned from an elbow injury in Toronto but was shocked by Swiss teen Belinda Bencic in the semifinals.<unk> Williams returned from an elbow injury in Toronto but was shocked by Swiss teen Belinda Bencic in the semifinals.<unk> Williams returned from an elbow injury in Toronto but was shocked by Swiss teen Belinda Bencic in the semifinals. ️<unk>️<unk>️<unk>️<unk>️<unk>️ At the US Open, Williams had a chance to win the calendar Grand Slam but was upset by Roberta Vinci in three sets in the semifinals.<unk> At the US Open, Williams had a chance to win the calendar Grand Slam but was upset by Roberta Vinci in three sets in the semifinals. Williams was the three-time defending champion, but on October 2, Williams withdrew from the tournament to heal her injuries and recapture her motivation.<unk> Williams was the three-time defending champion, but on October 2, Williams withdrew from the tournament to heal her injuries and recapture her motivation.