Brazilian-born Pereira moved to Portugal at a young age and emerged from Sporting's youth set-up in 2014 at the age of 18, making sporadic appearances in the following two seasons.
Loan spells at Chaves and Nurnberg followed with Pereira posting positive numbers despite seeing his appearances limited, particularly in Germany, but he has found his style at West Brom, producing a series of sensational displays that have sent WBA to the top of the Championship and in the hunt for promotion.
It's rare to see a player so clearly meant for a higher level than Pereira in the Championship this season. The playmaker bases himself on the right wing of Slaven Bilic's 4-2-3-1 attack and just drifts inside to influence games to an immense degree.
His touch, poise and ability to drift seamlessly past opponents just can't be underestimated and while he has excellent players around him - the likes of Grady Diangana, Jake Livermore and Romaine Sawyers are top-class talents - his numbers from a creation perspective are just so impressive. His 11 assists are the most in the competition, and beyond that 2.33 Through Passes P90 is the third-best in the league, 1.19 Key Passes P90 positions him in second, while
2.5 Deep Completions is also third.
He's a creator, one willing to make the difficult pass if that is the best option and the fact he is very good at it also helps. Pereira's passes are past the defender before he realises and he has also chipped in with goals of his own, too, with five goals as well as averaging 2.3 shots on goal P90.
But there are intangibles to him too - his swagger, and the clear confidence his team-mates have in him to make something happen. Again, his ability is slightly indulged by a team that allow him to shine, but on this season's evidence, he deserves that pedestal.
WHERE COULD HE GO NEXT?
He will 100% be a West Brom player, with the club set to meet Sporting's demands and sign him permanently before the end of the season.
To that end it's difficult to see him featuring anywhere else other WBA as of the start of next season, with the club currently in a great position for promotion and, once they reached the promised land, will have no obligation to listen to offers.
LEARN A LITTLE MORE
PROJECTED TRANSFER FEE: WBA have a deal to buy him permanently for £9m in January, which looks an absolute steal. He will be a £20m+ once WBA seal promotion.