Taking to his Instagram profile on Sunday afternoon after a weekend which saw his new club defeated 2-1 away to Preston North End at Deepdale, Whittaker penned a farewell message to the Green Army, who watched their side secure a dramatic point away to Boro's North East rivals, Sunderland on Saturday.

The deal for Whittaker, who has signed a contract with Boro until 2029, also includes £2m in potential add-ons

Plymouth Argyle forward Morgan Whittaker has completed a £6m transfer to Championship rivals Middlesbrough. BBC Radio Tees reported on Friday that the 24-year-old was having a medical before a permanent move to Riverside Stadium.

Plymouth Argyle manager Miron Muslic says Morgan Whittaker 'did not show up' as he explained the Middlesbrough target's absence from the heavy defeat to Burnley.

Plymouth Argyle have accepted a transfer bid from Championship rivals Middlesbrough for forward Morgan Whittaker. Whittaker is undergoing a medical at Middlesbrough ahead of a transfer in the region of £6million ($7.

Boro faced competition from Burnley for the 24-year-old's signature, but appear to be closing in on the transfer after a deal was secured with the Championship basement club. Finn Azaz, who enjoyed a fruitful partnership with Whittaker at Home Park, is believed to have played his part in convincing Whittaker on the move to the Riverside.