The 28-year-old has joined Valencia on loan with a view to a permanent deal.

"It was a tough job sealing the signing because Nelson is a highly-valued player at Rubin," said Valencia's sporting director Braulio Vazquez.

"He is a very important player for us because he is a forward who fits very well with the players we have.

"He has strength, commitment, speed and gets forward very well. He will also give us goals. We have a lot of confidence in him."