Poland Under-21 international Krystian Bielik joined Derby County from Premier League side Arsenal in the summer of 2019.
Bielik, a midfielder who is also capable of playing in defence, joined the Rams on a five-year contract after an undisclosed fee was agreed with the Gunners.
He starred during a loan spell with Charlton Athletic in the 2018/19 season as they gained promotion to the Championship.
He was an influential figure as the Addicks finished third in the League 1 table and overcame Sunderland in the Play-Off Final.
As a result of his impressive season he attracted interest from clubs not only in England but across Europe.
Derby, however, won the race to secure his signature and he is viewed as a player who is set to have a big future for both club and country.
Bielik joined Arsenal from Polish side Legia Warsaw in January 2015 at the age of 17 for a reported fee of £2.4 Million after impressing in their first-team set-up.
His first appearance for Arsenal’s first team came towards the end of 2015 as he came off the bench for Arsenal in an EFL Cup tie at Sheffield Wednesday.
Another EFL Cup appearance, in a 4-0 thrashing of Nottingham Forest at the City Ground in September 2016, was then followed by a loan switch to Birmingham City in January 2016 and he made ten appearances for the Blues before returning to North London.
Injuries limited his game time in another loan spell, at Walsall in the second half of the 2017/18 campaign, before a successful stint in League 1 with Charlton Athletic in 2018/19.
Bielik made 34 appearances in all competitions and scored four goals as Charlton reached the League 1 Play-Off Final and defeated Sunderland 2-1 at Wembley Stadium to secure promotion to the Championship.
He produced a Man of the Match performance against the Black Cats, with Lee Bowyer’s side coming from behind to claim a last-gasp victory.
On the international stage, Bielik has represented Poland at various youth levels and was part of the Poland Under-21 side at the 2019 UEFA European Under-21 Championships.
Although Poland didn’t make it past the group stages, Bielik did score in their victories against Italy and Belgium.