Andre Gomes and Rodrigo Moreno have both reportedly signed long-term deals with Valencia, having initially joined the Spanish club on loan.
Both players joined Los Che on loan from Benfica at the start of this season, with a view to making the moves permanent at the end of this campaign.
Rodrigo told reporters at a press conference: "From now on, I'm a Valencia player for five seasons. It was explicitly agreed in the contract that we signed."
Meanwhile, it is understood that highly-rated midfielder Gomes has also signed a long-term deal until 2019.
The youthful duo have been key players for Valencia this season.