<sod>before he began coaching [[Vera Zvonareva]]. The two began working together in April 2010, after the [[2010 Family Circle Cup]] in [[Charleston, South Carolina]].<ref name="Vera">Zvonareva.ru: [http://www.zvonareva.ru/index2.php?Id=20 Vera's Team] (Retrieved 8 March 2010)</ref> At first, he was her hitting partner and then became her coach.<ref name="SD">GoTennis.com: [http://gototennis.com/2010/07/01/hot-streak-vera-zvonarevas-coach-and-hitting-partner-sergey-demekhine/ Vera Zvonareva's Coach and Hitting Partner Sergey Demekhine] (1 July 2010)</ref> Under his guidance, Zvonareva reached the finals of the [[2010 Wimbledon Championships]]<ref name="W1">[[2010 Wimbledon Championships]]: [http://2010.wimbledon.org/en_GB/news/articles/2010-07-03/201007031278171892951.html Champion Serena still putting the SW into SW19] (3 July 2010)</ref><ref name="W2">[[2010 Wimbledon Championships]]: [http://2010.wimbledon.org/en_GB/news/articles/2010-07-03/201007031278171346992.html Zvonareva left reeling by Serena power] (3 July 2010)</ref> and the [[2010 US Open (tennis)|2010 US Open]],<ref name="USOpen">[[2010 US Open (tennis)|2010 US Open]]: [http://www.usopen.org/new_york_magic_continues_for_kim_clijsters/ New York Magic Continues For Kim Clijsters] (12 September 2010)</ref> the semifinals of the [[2011 Australian Open]],<ref name="AO11">[[WTA Tour]]: [http://www.wtatennis.com/news/20110127/clijsters-slam-streak-continues_2256076_2277717 Clijsters Slam Streak Continues] (27 January 2011)</ref> and the World No. 2 ranking.<ref name="WTA">[[WTA Tour]]: [http://www.wtatennis.com/news/20101025/zvonareva-ascends-to-no2_2256076_2196686 Zvonareva Ascends To No. 2] (25 October 2010)</ref> In April 2011 Vera Zvonareva split with Demekhine.<ref>[http://www.tennis.com/articles/templates/news.aspx?articleid=11713&zoneid=25 Zvonareva, coach split over team approach] (29 April 2011)</ref><eod>
<sod>before he began coaching [[Vera Zvonareva]]. The two began working together in April 2010, after the [[2010 Family Circle Cup]] in [[Charleston, South Carolina]].<ref name="Vera">Zvonareva.ru: [http://www.zvonareva.ru/index2.php?Id=20 Vera's Team] (Retrieved 8 March 2010)</ref> At first, he was her hitting partner and then became her coach.<ref name="SD">GoTennis.com: [http://gototennis.com/2010/07/01/hot-streak-vera-zvonarevas-coach-and-hitting-partner-sergey-demekhine/ Vera Zvonareva's Coach and Hitting Partner Sergey Demekhine] (1 July 2010)</ref> Under his guidance, Zvonareva reached the finals of the [[2010 Wimbledon Championships]]<ref name="W1">[[2010 Wimbledon Championships]]: [http://2010.wimbledon.org/en_GB/news/articles/2010-07-03/201007031278171892951.html Champion Serena still putting the SW into SW19] (3 July 2010)</ref><ref name="W2">[[2010 Wimbledon Championships]]: [http://2010.wimbledon.org/en_GB/news/articles/2010-07-03/201007031278171346992.html Zvonareva left reeling by Serena power] (3 July 2010)</ref> and the [[2010 US Open (tennis)|2010 US Open]],<ref name="USOpen">[[2010 US Open (tennis)|2010 US Open]]: [http://www.usopen.org/new_york_magic_continues_for_kim_clijsters/ New York Magic Continues For Kim Clijsters] (12 September 2010)</ref> the semifinals of the [[2011 Australian Open]],<ref name="AO11">[[WTA Tour]]: [http://www.wtatennis.com/news/20110127/clijsters-slam-streak-continues_2256076_2277717 Clijsters Slam Streak Continues] (27 January 2011)</ref> and the World No. 2 ranking.<ref name="WTA">[[WTA Tour]]: [http://www.wtatennis.com/news/20101025/zvonareva-ascends-to-no2_2256076_2196686 Zvonareva Ascends To No. 2] (25 October 2010)</ref> In April 2011 Vera Zvonareva split with Demekhine.<ref>[http://www.tennis.com/articles/templates/news.aspx?articleid=11713&zoneid=25 Zvonareva, coach split over team approach] (29 April 2011){{Dead link|date=March 2016}}</ref><eod>