Real Madrid have been asked to offer Sergio Ramos a new contract by former player Hamit Altintop.
The veteran center-back is set to leave Real amid disagreements over a new deal.
He wants £ 13.4million to stay at the Bernabeu for one more season before he retires.
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Real are only willing to offer £ 11.1million, which is attracting interest from both Man Utd and Liverpool.
But Altintop, who played with Ramos in the 2011/12 campaign, believes the Spanish giants would be “seriously” missed if Ramos were to get an exit.
Talk to Goal, the retired Turkish star said: “Sergio Ramos is amazing. On and off the pitch.
“He knows the rules. He knows what it takes to get results, to win the biggest trophies. His experience is incredible. Few players spend 15 or 16 years at Real Madrid.
“I have a lot of respect for him and he deserves everything; all trophies, all contracts, all interests! He would miss Real Madrid dearly if he left.
Reports have previously suggested that Man Utd was’ ready to meet ‘Ramos’ agent on a passage to Old Trafford.
These talks have yet to materialize, casting doubt on a transfer.
Liverpool and Paris Saint-Germain are the other top clubs to have been linked with the Spain international.
Earlier this month, the player scored as Real beat Atalanta 3-1 in the Champions League round of 16.
It was then excluded from their quarter-final clash against Liverpool due to injury.
However, Los Blancos got off to a winning start in the draw, beating Liverpool 3-1 in the first leg.
Ramos is hopeful his side can get the job done in the second leg to continue on the path to European success.
He has already won numerous trophies during his time in Madrid, including five La Liga titles and four Champions Leagues.
This success makes him an attractive signing for Man Utd and PSG, who are chasing their own European glory.
Ramos is expected to return in time for the Champions League semi-finals, if Real keep Liverpool at bay in the second leg.