Big-name stars from Eden Hazard to Mohamed Salah much of the praise and attention in the Premier League but every so often, an unexpected player will rise to the occasion and in the process save their chairman a few million quid.
These players could go on to be Premier League greats - earning their clubs millions in the process - or, as many do, fade into the abyss and end up playing lower league football in a foreign land.
Here is a look at seven players who have surpassed all expectations in their breakthrough season in England's top flight...
David Brooks - AFC Bournemouth
David Brooks' last 7 appearances for @afcbournemouth:— Sky Sports Statto (@SkySportsStatto) January 30, 2019
Dec 22 v Brighton ⚽️⚽️
Dec 26 v Tottenham
Dec 30 v Manchester Utd ️
Jan 2 v Watford
Jan 13 v Everton
Jan 19 v West Ham ️
Tonight v Chelsea ️⚽️ pic.twitter.com/ZUN2Hh0oya
It has been an impressive debut season at Bournemouth for the Welshman. Following his £10m summer move from Sheffield United, the 21-year-old has gone on to make 22 impressive appearances this term for the Cherries in the Premier League - scoring six and assisting four goals.
Now there is talk of the Manchester City academy graduate moving on to bigger and better things with Bournemouth expected to make a tidy profit on the midfielder should he be able to be prised elsewhere.
Sean Longstaff - Newcastle United
Sean Longstaff vs Tottenham Hotspur:— The Spectator's View (@thespectoview) February 2, 2019
2 fouls won
1/2 long balls
1/1 aerial duel
1 chance created
What the stats don't reflect is how composed, assured and aware Longstaff was at all times today. He's been class. pic.twitter.com/zjXzps2u37
The 21-year-old tore up League One while on loan at Blackpool last season, and after making his
Mattéo Guendouzi - Arsenal
Declan Rice - West Ham United
Declan Rice: Has won possession in the midfield third more times (113) than any other player aged 23 and under in Europe's top five leagues this season— WhoScored.com (@WhoScored) February 13, 2019
For more player stats -- https://t.co/HmYJkYwMXd pic.twitter.com/UQDzyfbPGo
Admittedly, this one is a bit of a cheat - with Rice already enjoying a
Aaron Wan-Bissaka - Crystal Palace
Tackle Win %— Premier League Stats (@PremierStats2) February 21, 2019
磊93.2% - Aaron #WanBissaka
賂88.1% - Ben #Mee
雷87.9% - Ryan #Bertrand
4️⃣87.9% - Luiz
5️⃣87.3% - Digne
6️⃣85.7% - S Cook
7️⃣85.7% - Mustafi
8️⃣85.4% - Bernardo
9️⃣85.4% - Coleman
82.4% - Sokratis
(Minimum 30 Tackles Attempted) pic.twitter.com/QtPYDMniXe
It's fair to say England boss Gareth Southgate has a plethora of options when it comes to the right back position - Kyle Walker, Kieran Trippier
Dwight McNeil - Burnley
Dwight McNeil: Has gained a better WhoScored rating (7.29) than any other played aged 21 and under in the Premier League this season (5+ apps)— WhoScored.com (@WhoScored) January 21, 2019
For more player stats -- https://t.co/0NJ01zhUFJ pic.twitter.com/icgw2fggre
It's been a mixed season for Sean Dyche and Burnley this term. Following last season's qualification for the Europa League, the Clarets have struggled balancing league and cup competitions.
One positive to come from Turf Moor is the emergence of 19-year-old
James Maddison - Leicester City
James Maddison: Made more key passes from set-piece situations vs Tottenham (6) than any other player has managed in a Premier League match this season— WhoScored.com (@WhoScored) February 11, 2019
For more match stats -- https://t.co/TsN4AU8dIA pic.twitter.com/xMv2LoxlUI
Following just one full season in the Championship, Leicester City splashed out £22m on the English midfielder - which certainly raised a few eyebrows at the time. Fast-forward a few months and Maddison is in the England squad and enjoying an excellent run of form in a Foxes shirt.
With 25 Premier League appearances along with five goals and four assists, the 22-year-old is already proving value for money as Leicester City look to build on a disappointing campaign which has seen Claude Puel sacked following their third straight defeat.