you're much less unlucky than I am, remember I lost 727/1 parlay with my last leg 2 points away from the match and then wasting 0-40 in the 3rd...nobody is more unlucky than I am. So make those parlays winning parlays and keep them going.
If they're not for fun I'd say ditch the challengers and concentrate on something that is more reliable - like football or American sports. I thought most people's tennis betting season ended yesterday, perhaps a couple of big bets on the DC final left but I wouldn't go big with challengers.
not to mention Vinci is very experienced and he can beat this mug regardless...bad call...I think Vici can make a run next season for regaining a top 100 spot ( from current #795 )
Lacko is the worst player to ever reach #51, I honestly don't understand how this tool wins matches.