Tennis used to be renowned for intense rivalries and much bad blood between champions. But as Alcaraz and Djokovic show, while modern tennis remains intense, rivalries are based on mutual appreciation ...

Carlos Alcaraz knows he must fine-tune his serve to keep his Wimbledon title defence on course. The Spaniard has been unimpressed by his serve during wins over Fabio Fognini and Oliver Tarvet in the ...