Lazio remain determined to beat a clutch of Premier League clubs to sign Felipe Anderson in the summer.
The Brazilian attacker has been watched by Chelsea and Tottenham in the past but Lazio believed they had beaten the pair to sign him in the January transfer window.
However, due to a late arrival of the necessary paper work, the move could not be rubber-stamped in time and Anderson will remain at Brazilian side, Santos.
Lazio, though, believe they remain in pole position to sign the 19-year-old and will have a go again in the summer.
"The desire of the player and ours is to take this negotiation forward and conclude it in the summer," sporting director Igli Tare told La Lazio Siamo Noi.
"We did everything possible to sign him because he would have been the icing on the cake for us. We had an agreement and it should have ended positively.
"However, things then got complicated because his club and the fund who own 50 per cent of his contract couldn't agree on how to split the fee.
"We had agreed a £7m fee, plus 30 per cent of any future sale amount, but the two parties could not reach a solution."