Carlos Alcaraz has to adapt to his new role and learn to play matches as the number one ranked player, says long-time coach Juan Carlos Ferrero.Alcaraz had an outstanding year last year, winning five titles, including two Masters at Madrid and Miami and sealing it with his maiden Grand Slam title at the US Open. In doing so, he became the youngest ever man to be ranked world number one, aged just 19.Following the US Open, Alcaraz played in just four tournaments to close the season before having to withdraw from the ATP Finals due to injury. He won one and lost one in the David Cup, lost his only match at the ATP 500 in Astana, reached the semi-finals in Basel and the quarter-finals of the Paris Masters.Coach Ferrero, a former world number one himself, says going into those matches as world number one had a jarring effect on the young Spaniard.“After the US Open it was difficult to adapt to his new role on the tour for him,” Ferrero told Arab News.“I was talking to him (Alcaraz) about how he had to manage everything but I think he needed to feel and to live it, go to a tournament and feel that pressure of being No 1, pl …