Lazio paid Al-Sadd around €3 million last summer to secure the player’s services on loan with an option to buy half his rights by the end of April for a fee of €5.5m. If taken, they would then buy the remaining half for €8.5m next year.
Zarate has made a big impression in his maiden season in Italy, netting 12 goals in Serie A and one in the Coppa Italia.
The ex-Birmingham City man helped the Biancocelesti to a crushing 4-2 win over Roma in the derby this month and bagged the winner on Saturday at Genoa.
Vince Masiello, Goal.com