<p>Napoli's record goal scorer Dries Mertens has been ruled out for at least three weeks with a sprained left ankle, the Serie A club confirmed on Thursday.</p>.<p>The 33-year-old Belgian international limped off in the first half of Napoli's 1-0 defeat at Inter Milan on Wednesday.</p>.<p>"(Tests) revealed a first/second degree sprained trauma to his left ankle," Napoli said in a statement.</p>.<p>"Mertens has already begun rehabilitation which will continue in Belgium during the Christmas period. His condition will be re-evaluated in three weeks."</p>.<p>Mertens will miss Napoli's next four league games, against Lazio and Torino before Christmas and Cagliari and Spezia in the first week in January.</p>.<p>Gennaro Gattuso's side are fourth in Serie A, five points behind leaders AC Milan. They play Juventus in the Italian Super Cup on January 20.</p>.<p>Mertens has scored 130 goals for Napoli since signing from PSV Eindhoven in 2013, including five this season in all competitions.</p>
<p>Napoli's record goal scorer Dries Mertens has been ruled out for at least three weeks with a sprained left ankle, the Serie A club confirmed on Thursday.</p>.<p>The 33-year-old Belgian international limped off in the first half of Napoli's 1-0 defeat at Inter Milan on Wednesday.</p>.<p>"(Tests) revealed a first/second degree sprained trauma to his left ankle," Napoli said in a statement.</p>.<p>"Mertens has already begun rehabilitation which will continue in Belgium during the Christmas period. His condition will be re-evaluated in three weeks."</p>.<p>Mertens will miss Napoli's next four league games, against Lazio and Torino before Christmas and Cagliari and Spezia in the first week in January.</p>.<p>Gennaro Gattuso's side are fourth in Serie A, five points behind leaders AC Milan. They play Juventus in the Italian Super Cup on January 20.</p>.<p>Mertens has scored 130 goals for Napoli since signing from PSV Eindhoven in 2013, including five this season in all competitions.</p>