Lazio boss Delio Rossi fears management are focusing too much on securing Mauro Zarate to a permanent deal.
The likes of Goran Pandev and Cristian Ledesma are also waiting for new contract offers and Rossi warned: "A team like Lazio, who have opened a new era, need to improve the side rather than revolutionise it.
"That means keeping the best players to continue the growth process. With Zarate's confirmation, we cannot let others get away instead."