Leeds United rounded off an impressive week on and off-the pitch as they ran out 3-1 winners over Derby County on Sunday afternoon. 

The Whites headed into the match with limited pressure, after Brentford's defeat to Stoke meant that Marcelo Bielsa's side were already crowned Championship champions.

Marcelo Bielsa made a number of changes to his starting XI with the pressure off of his side, but they fell behind in the second-half as Chris Martin opened the scoring for the home side.

But Derby's lead didn't last long, as Pablo Hernandez fired home clinically to equalise for Leeds. The league-leaders then took the lead on 75 minutes, as Jamie Shackleton scored his first senior goal for the Whites, which came before a Matt Clarke own goal rounded off an impressive win for Leeds.

The Yorkshire-based side take on relegation-threatened Charlton Athletic in their final match of the season, as they look to pick up another three points at Elland Road.

We take a look at THREE things we learnt about Leeds after this impressive win over Phillip Cocu's side.

Pablo Hernandez is made for the Premier League. 

Hernandez scored Leeds' first goal of the day in this one, as he fired home clinically past Kelle Roos.

The goal was the Spaniard's ninth of the season, and we've already seen how much it means to win promotion back into the Premier League with Leeds.

He's a player that has endeared himself to the Elland Road faithful, and will be hoping he can replicate similar performances for the Whites in the top-flight next season.

Bielsa's team selection sprung a few surprises.

Marcelo Bielsa has often been reluctant to make too many changes to his team, but he certainly made the most of his side being crowned champions.

The Argentine handed starts to the likes of Ian Poveda, Jamie Shackleton, Barry Douglas and Pascal Struijk all starting against Derby.

But they certainly didn't look out of place by any stretch of the imagination, and it'll be interesting to see which players are included in the starting XI for the match against Charlton Athletic in midweek.

Jamie Shackleton caught the eye. 

Shackleton has struggled for consistent game time this season with Leeds, which is understandable given the fact that the likes of Mateusz Klich and Kalvin Phillips were ahead of him in the pecking order.

But he caught the eye with an impressive showing against the Rams on Sunday, and rounded of a strong performance with his first senior goal for the Whites.

It'll be interesting to see what the future holds for Shackleton, especially if Leeds are to strengthen their squad ahead of a long-awaited return to the Premier League.