With the Premier League transfer window closing before the start of the 2018/19 season, several of the club's managers would have been aggrieved by the new ruling.
The rest of Europe, meanwhile, have until midnight on Friday to conclude their transfer dealings.
However, some established names, surprisingly remain unattached and could provide to be shrewd acquisitions for Europe's elite.
1. Yaya Toure
At 35, Toure may be past his peak but the three-time Premier League winner holds vital experience at the highest level,
Since leaving Manchester City, Toure has not been short of suitors but it's likely the Ivory Coast legend is biding his time for the perfect move to see of his illustrious career.
2. Miguel Veloso
At 32, with 56 Portugal caps to his name, the left-footed defensive midfielder is one of the more attractive propositions on the market.
Technically gifted with the ability to dictate the tempo of the game from deep, the former Genoa and Sporting CP man has been linked with several English top-flight sides.
3. Claudio Marchisio
A seven-time Serie A champion and Juve icon after 25-years of sterling service for his boyhood club.
A surprise exit for the 32-year-old last week has seen European club's sprawling for his services.
AS Monaco, Zenit St Petersberg and Tottenham have all been linked with a move for the 55-time capped Italy midfielder.
4. Samir Nasri
Tipped to become one of the greats of the game after bursting on the scene with Marseille, Nasri's career has somewhat spiralled out of control over the past three seasons.
The two-time Premier League winner with Manchester City was released by Super Lig side Antalyaspor this year and remains a risk worth taking at 31.
5. Hatem Ben Arfa
A mercurial talent that's career failed to live up to potential after questionable career moves which saw him at Newcastle and Hull City at one point.
After reigniting his career at OGC Nice, a dream move to PSG followed but he failed to establish himself at the Ligue 1 champions.
Now, a free agent once again, also 31, like his compatriot Nasri, the left-footed playmaker still has plenty to offer European football.
Former Manchester United striker Giuseppe Rossi is a notable mention as an incredibly gifted forward, however, the 31-year-old has a checkered history with knee injuries so he just misses out on the list.