Croatian teenager Martin Dolenc cemented his position at the top of the leader board at the kite racing TwinTip European Championships in southern Italy with another strong performance. But Dolenc, 17, leading the Open division after a long day on the blue Mediterranean waters in perfect breezes that climbed to around 17kts, found himself pushed ever harder as rivals dialled-in their skills in the new format. When the thermal breeze kicked in early afternoon on day two of the International Kiteboarding Association (IKA) TT:R European Championships, it fuelled intense close-fought racing over a remarkable 49 short, sharp heats lasting just…