Brighton have rejected a 60m bid from Arsenal for midfielder Moises Caicedo.
The Premier League leaders are keen to strengthen their squad after Mohamed Elneny picked up an injury in training that could mean a lengthy lay-off.
Arsenal already have a small squad and manager Mikel Arteta does not want to jeopardise his team's title challenge through a lack of numbers.
Brighton had reportedly already turned down a 55m bid by Chelsea for 21-year-old Caicedo.
Brighton manager Roberto de Zerbi told a news conference on Friday that the midfielder was "relaxed" and "focused only on Brighton."
The Italian said: "I spoke with him like a father, not like a coach.
"I hope he can stay with us until the end of the season because for my idea/my opinion that's the best solution for him and for us."