( CNN ) -- Venus Williams rolled back the clock at the Rogers Cup in Montreal Saturday to claim victory over her younger sister and World No 1 . Serena Williams for the first time in five years . The unseeded Venus lost the first set of the semifinal matchup on a tie break but battled back to win 6-7 ( 7/2 ) 6-2 6-3 in just over two hours . Venus secured what was effectively the match-wining break in the sixth game of the final set before holding her nerve to serve out . Despite firing down 19 aces , Serena will be left to rue making considerably more unforced errors than her sister , including nine double faults . `` The level of game we played was pretty high , '' Venus was quoted as saying by the WTA website after the match . Venus has struggled for form in recent years and has suffered from injury and illness . But she has bounced back in 2014 and already has one WTA title for the year under her belt . On finding her way back in to the game , she said : `` I 've been working hard , and more importantly I 've been feeling better . `` I hope I can keep some of this control in my life . If I have that control , I can enjoy being on the court , and I can win as well . '' Although she came up short on Saturday , Serena still leads the family head to head in competitive matches by 15-11 . The pair have won 26 major singles titles between them ( 17 for Serena and nine for Venus ) and first faced off in the Australian Open in 1998 . Speaking on court after the match , Serena described being disappointed with some of her own play but was happy to see her sister perform so convincingly . `` She was really opening the court well , '' Serena said . `` She ( Venus ) is such a good mover . `` I think her serve was way more consistent than mine . I had more aces , but she was just serving better . `` Ultimately I think she returned better as well . '' Venus will now play either Agnieszka Radwanska or Ekaterina Makarova , who meet in the day 's other semi-final .
Venus Williams defeats her sister Serena in the Rogers Cup semifinal . Venus had n't beaten Serena in a competitive match since 2009 . Serena took first set but Venus battled back to win 6 -7 ( 6 ) 7/2 -2 6-3 .