Five things to know about Man United and Liverpool target Stefan de Vrij

With Manchester United, Chelsea, Liverpool and Inter Milan all linked with a move for Lazio's Stefan de Vrij, who will leave Lazio as a free agent in the summer, here are five things to know about the €35 million-rated defender.

1. He rose at a very young age

Born on Feb. 5, 1992, in Ouderkerk aan den IJssel, Netherlands, De Vrij started out at amateur club VV Spirit, where he plied his trade as a midfielder for five years. After participating in Feyenoord's talent recruitment day in 2002 at the age of 10, he was invited back for training and featured in a friendly, after which he was offered a place in the club's academy.

There, further qualities in addition to his excellent distribution of the ball were noted and he was transformed into a defender, initially a right full-back. After debuting in the Eredivisie at the age of 17, he became the Dutch club's youngest ever captain in 2012 under the tutelage of Ronald Koeman. He made 154 appearances for the Rotterdam club before joining Lazio for a reported fee of €8.5m in 2014.

É stato un periodo difficilissimo pieno di speculazioni sul mio futuro fino ad arrivare a questo punto che nessuno desiderava. Purtroppo per diversi motivi non siamo riusciti a trovare un accordo soddisfacente per entrambe le parti. Capisco molto bene la delusione dei Laziali e mi fa male andare via in questo modo. Anche se qui sono felicissimo e mi sento a casa, a volte bisogna uscire dalla propria comfort zone per poter raggiungere gli obiettivi desiderati. Sarò per sempre grato alla Lazio e ai tifosi per essere sempre stati dalla mia parte e per tutta la fiducia e le opportunità che mi sono state date. Ho provato a dimostrarlo ogni giorno dando il massimo e continueró a farlo fino alla fine! Grazie, Stefan. It has been a very difficult period full of speculations on my future to come to this point that nobody desired. Unfortunately we were not able to find a satisfying agreement for both parties due to various reasons. I understand the disappointment of the Lazio fans very good and it hurts me leaving in this way. Even though I am very happy and I feel at home here, sometimes we need to get out of our comfort zone to achieve our desired goals. I will be forever grateful to Lazio and to the fans for always being there for me, for the trust and opportunities given. I have always tried to demonstrate that by giving the best of me and I will keep doing that until the end. Thank you, Stefan.

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2. He was a runner up at the 2009 U-17 Euros

Before captaining his club, De Vrij was part of the Dutch Under-17 side which were beaten in the final by hosts Germany at the 2009 UEFA European U-17 Championship.

Prior to the final, Dutch captain Oguzhan Ozyakup gave the lowdown on his teammates to UEFA.com, and this is what he had to say of De Vrij: "Try to get past him! I'm certain the Germany strikers are going to have a hard time in the final. Stefan is a very good header of the ball and has also a very good long pass."

3. He's overcome a major knee operation

After a successful first season with the Biancocelesti, during which he made 35 appearances, in November 2015, De Vrij underwent surgery on a serious knee injury he had picked up two months earlier while on international duty with the Netherlands.

The initial damage sustained in a 1-0 Euro 2016 qualifying defeat to Iceland was overseen, with the player managing a further 45 minutes in the 3-0 loss to Turkey just three days later before raising the white flag. A layoff of six months was forecast when he did finally go under the knife after more conservative attempts to treat the injury failed, but he ended up missing a total of 350 days before returning for Lazio's 4-3 win at Atalanta on Aug. 21, 2016.

4. He was a stalwart at the 2014 World Cup

He represented his country at the 2014 World Cup, playing all seven games as the Oranje finished in third place, scoring in their 5-1 opening win over Spain which set the tone for a tournament in which the Netherlands were beaten only on penalties by Argentina in the semifinals.

To date, he has 33 caps for his country and has scored three goals, although he faces an uncertain future for his national team following the recent appointment of Koeman as head coach. Why? Koeman scrapped him of the Feyenoord captaincy in 2013 and gave the armband instead to Graziano Pelle, reportedly because the young defender had angered his coach by scheduling extra training sessions behind his back.

According to de Volkskrant, however, Koeman was just trying to shake his team up in the season's run-in and put the more experience Italian in the spotlight, thus "relieving De Vrij of some pressure."

5. He's a fan favourite at Lazio

A petition was launched on change.org in January for Lazio to tie De Vrij down with a new contract. As of Feb. 20, 2,758 people had signed -- still quite a ways short of the target of 5,000, and with few likely to sign up in the wake of Lazio sporting director Igli Tare's announcement that their contract offer is being withdrawn.

Why petition for him to stay? "It's a perfect chemistry which must not be ruined," said the motivation for the petition. "Stefan De Vrij is a cornerstone of this squad, one of our biggest champions and it would be a real shame if our paths were to divide, now that things are just starting to get interesting, which is why we, the Lazio fans, are calling on both club and player to make the effort, so that we can fly on together, without setting any limits."