Earlier in the summer transfer window, Scottish Premiership giants Rangers sold Barrie McKay to Nottingham Forest in the Championship in England.
According to BBC Sport, Forest had to pay Rangers a transfer fee of £500,000 in order to secure the services of McKay.
The 22-year-old is a very talented and promising young winger, and many will have been surprised that the Gers sold him so cheaply.
Rangers could actually have got much, much more for McKay had they decided to sell the Scotland international winger in the January transfer window.
The Scottish Sun reported in January that German club RB Leipzig wanted to sign the youngster from Rangers and were lining up a £6 million move.
McKay failed to do much of note in the second half of last season, and one suspects that the Rangers chiefs will regret not selling him in January when they could have got £6m.
Gordon has been at Celtic since 2014 and is a good goalkeeper, and the Scotland international was linked with a move to Chelsea in the January transfer window.
According to BBC Sport, Premier League giants Chelsea made a bid of £3.5 million for the 34-year-old, but Celtic turned it down and the goalkeeper signed a new contract in March, as reported by Sky Sports.
However, the former Sunderland custodian’s recent performances have not been great, with the 34-year-old making mistakes in games against Rapid Vienna and Heart of Midlothian.
Celtic fans are becoming frustrated with Gordon and some want the Glasgow giants to sell him this summer (click here to read more).
While it is hard to see the Bhoys letting Gordon leave this summer, given that he will turn 35 in December, Celtic will not get the £3.5m they could have got from the Blues in January or next summer.