KEY POINTS:
World number three Novak Djokovic had to shake off a determined challenge from Fernando Verdasco to claim a 6-7, 6-3, 6-3 win over his unseeded opponent in the second round of the Madrid Masters tennis tournament.
The 20-year-old will face Juan Carlos Ferrero in the last 16 after the Spaniard beat compatriot Carlos Moya 7-6, 6-4 in a duel between former world number ones.