The Spurs boss was asked if the Denmark international would be staying in his pre-match press conference and told reporters "I don't know."
Pochettino then offered some further thoughts on Eriksen:
Eriksen's Tottenham contract expires in 2020 and his "clear preference" is to move to Real Madrid, according to Miguel Delaney at The Independent. The transfer window remains open in Spain until September 2.
Spurs "would want" to sell if they cannot agree a contract extension with Eriksen to avoid him walking away for free next summer, per the report.
Eriksen has become one of Tottenham's most influential players since arriving from Ajax in 2013. He is an experienced midfielder who brings creativity, goals and assists to the team.
However, he told Ekstra Bladet (h/t David Hytner at The Guardian) in June that he would like a new challenge.
"I feel that I am at a stage of my career where I would like to try something new," he said. "I have the deepest respect for everything that is happening at Tottenham and it would not be something negative to stay. But I have also said that I would like to try something new."
Meanwhile, Eriksen demonstrated his importance to Spurs again on the opening day of the season against Aston Villa. The Dane arrived as a substitute and helped his team come back from 1-0 down to win 3-1:
Eriksen is in line to feature in Saturday's Premier League clash with Manchester City, but speculation over his future will continue while the transfer window remains open around Europe.