MIAMI - Indian Wells champion Carlos Alcaraz has plenty to smile about heading into this week's Miami Open with long-time coach Juan Carlos Ferrero helping him regain top form after a brief absence from his box at the start of the season.

Former world number one Ferrero, who retired from playing in 2012, underwent knee surgery and was absent from the Australian Open, where 20-year-old Alcaraz lost in the quarter-finals to Alexander Zverev.