An article about him from my favourite football blog; some statisticians who sell their services to various football clubs.
To give them some credibility;
The person who owns it was employed by Brentford for 5 years who oversaw a lot of signings that they sold on for profit.
Also use stats to win the Danish Superliga with an unfancied club whose name I can't spell... FC Midysnadsland or something like that. (5years ago)
They wrote an article before Salah moved to Liverpool on how he would be the signing of the season
Wrote an article about an 18 Mbappe how £90million would be value for money before he moved to PSG
Wrote an article on Naby Keita 5 years ago when he was Red Bull Salzburg on how Arsenal should buy him as he is exactly what they need.
A lot of good back catalogue articles there for people to go over if they want to learn more about football.
https://statsbomb.com/2018/11/idrissa-gueye-powers-evertons-surprising-defense/
Hence the 6-2 defeat to Tottenham I guess.
As I mentioned in other threads, they also say that any club who spends £20million+ on Andre Gomes is getting ripped off.