Maatsen is the 5ft 6in starlet who helped book Dortmund's UCL semi-final spot

The failure of Premier League clubs is once again proving to Borussia Dortmund's gain as Ian Maatsen and Jadon Sancho both starred in Tuesday's quarter-final Champions League victory over Atletico Madrid.

Maatsen scored Dortmund's crucial second goal to give them the lead against Atletico and he sent a pointed message to parent club Chelsea after another brilliant performance that has left Blues fans scratching their heads.

At just 22-years-old, the Dutch defender is a prodigy that Dortmund typically appear to be getting the best out of where others have been unable to do so.

Maatsen is on-loan at the Bundesliga giants until the end of the season and signed a new deal at Stamford Bridge before departing for Germany that keeps him at the club until 2026. But his recent impressive performances raise the question as to why he was allowed to leave in the first place.

After making 15 appearances for Chelsea this term, albeit with less than 400 minutes in total, Maatsen arrived in Dortmund with a point to prove after seeing opportunities limited under Mauricio Pochettino. He's certainly done that.

As his shot sailed past Jan Oblak to give Borussia Dortmund one-foot in the Champions League's final-four, there were likely pangs of pain felt in London.

Maatsen spent last season at Burnley and starred as Vincent Kompany's side won the Championship in dominant fashion, but later struggled for game time after returning to his parent club.

The youthful left-back was expected to be given more opportunities at Chelsea especially after full-back difficulties with previous injuries to both Ben Chilwell and Marc Cucurella.

Blues boss Pochettino claimed Maatsen would be 'more involved' in his squad as recently as December but found himself being