Possibly Roger Federer would have been ready to play the match against the socialite, who was willing to pay (in 2014) £160,000 for a celebrity match of tennis. But Russian tennis fan Lubov Chernukhin, 48, chose two different partners to be her opponents: David Cameron, then British prime minister, and Boris Johnson, then mayor of London. Chernukhin, who settled in Britain in 2003 and is a British passport holder, like her husband Vladimir, 50, a former Russian deputy finance minist ...