It doesn't happen as often as it used to, but the Big Four of men's tennis are safely into the second week of a Grand Slam tournament. Roger Federer, Novak Djokovic, Rafa Nadal and Andy Murray, the top four seeds here, all cruised through the first three rounds of Wimbledon to raise the prospect of the first all-Big Four semifinals since 2012. Djokovic, Federer, Nadal and Murray have only dropped one set between them in a combined 12 matches. Only Murray has spent longer than six hours on court—in total. And in one afternoon this week, Djokovic and Federer played on Centre Court for just 82 minutes after their respective opponents retired with injury. Four big players, and now a 40% discount - that is Betadvisor.com's gift to you this week. Use coupon code NEW4BIG to claim 40% off one-month subscriptions to all our Tennis Tipsters, valid until July 12. That's four reasons to celebrate this week. | 
