Serena Williams’ quest for a Grand Slam came to a disappointing and sudden halt in her semi­final match.

Williams was defeated in the semi­finals by unseeded Roberta Vinci of Italy 2-6, 6-4, 6-4. The first set belonged to Williams, but she struggled in the final two sets. She appeared to be tired, possibly because inclement weather forced the game to be played early last Friday rather than Thursday night as scheduled.

Although Williams lost in the semi­finals, she should be very proud of herself for her success in winning three majors and reaching the semi­finals, where she had stated she was not under pressure to win the Grand Slam, even though the question continued to be directed at her.

She stuck to her answers at every press conference, saying, “I am not under any pressure to win the calendar Grand Slam.” From her first match to her losing final match, the press conferences were all about her and the Grand Slam.

Meanwhile, big sister Venus Williams was named the winner of the 2015 U.S. Open Sportsmanship Award. “What more can you say that hasn’t already been said about Venus Williams?” asked USTA Chairman, CEO and President Katrina Adams. “She is the personification of class and grace as a competitor and is the perfect recipient of the Open Sportsmanship Award.” The Sportsmanship Award is presented to the professional tennis player who best demonstrates excellence in sportsmanship throughout the U.S. Open. Congratulations to Venus Williams for being a recipient of this award.