Arne Engels is poised to undergo a medical at West Ham after a deal was agreed with Celtic.

The Belgian midfielder emerged as a top transfer target for the Hammers ahead of their first Championship campaign for 14 years as they seek an immediate return to the Premier League.

Talks with Celtic began last month, but West Ham initially struggled to agree a fee for Engels.

However, understands that a deal worth potentially in excess of £25million if add-ons are met has now been agreed between the two clubs.

The initial fee is reported as £22m, which would set a new Championship record following Burnley’s obligation to sign Benfica loanee Florentino Luis permanently for £20.8m in July, with the Portuguese midfielder then sold to Ipswich.

Engels - who was the subject of multiple bids from Nottingham Forest in January - is believed to have travelled to London on Friday in order to undergo a medical and sign a long-term contract.

The 22-year-old will become West Ham’s fourth signing of the current window, with winger Manor Solomon having joined from rivals Tottenham earlier this week for £7m.

That followed the arrival of experienced defender Joel Veltman as a free agent following his departure from Brighton, while the club also triggered their £1m option to convert winger Keiber Lamadrid’s loan from Venezuelan club Deportivo La Guaira into a permanent deal.

West Ham are stepping up their bid for further new additions ahead of the September 1 transfer deadline, having endured a slow start to their summer business following relegation from the Premier League on the final day of last season.

The club banked over £150m from the sales of Mateus Fernandes, Crysencio Summerville and Freddie Potts, who joined Tottenham, Al-Hilal and Club Brugge respectively.

Manager Nuno Espirito Santo will value Engels’ versatility and ability to play in central midfield, out wide or at full-back.

He scored 17 goals and provided 22 assists in 100 total appearances across all competitions for Celtic after joining from German club Augsburg as their then record signing in an £11m deal in 2024, winning two Scottish Premiership titles as well as both domestic cups.

Following their come-from-behind 3-1 home Carabao Cup first-round win over Portsmouth last weekend to begin the new season, West Ham kick off the Championship campaign with a trip to promotion rivals Burnley on Sunday.