It would complete a reunion Coventry City supporters have wanted for some time, with the 29-year-old's Bramall Lane contract now entering its final year: Hamer spent three seasons at the club after arriving from PEC Zwolle in 2020, making 132 appearances and scoring the winning goal in the second leg of the 2023 Championship play-off semi-final against Middlesbrough, before Coventry lost the final to Luton on penalties and Hamer left for Sheffield United that August.
The midfielder has continued to perform well since the move, scoring 21 goals and adding 28 assists in 120 appearances for Sheffield United across three seasons, though the club have twice fallen short in their own attempts to reach the Premier League.
Coventry, meanwhile, have achieved what Sheffield United could not, sealing their own promotion to the top flight this year under Frank Lampard and ending a 25-year absence from English football's highest division — a shift in circumstances that has strengthened Coventry's hand in the negotiation.
Reported valuations for Hamer have swung widely across the window, from as low as £6m earlier in the year to figures nearer £15-20m more recently, with Leeds and Everton both previously credited with interest in the Brazilian-born midfielder.
Hamer, who also holds Dutch nationality and has represented the Netherlands at youth level, joined Sheffield United in August 2023 on a four-year deal for a fee believed to be around £15m. Some reports around the current talks have suggested Sheffield United could still owe Coventry a sell-on percentage from that original transfer, though neither club has confirmed this.
Sheffield United boss Chris Wilder has been reluctant to part with Hamer, but with promotion proving elusive again and Coventry now able to offer Premier League football, the balance appears to have tipped decisively toward a return to the CBS Arena.