Rojo, now 24, joined hometown club Estudiantes aged 10, and made his first team debut aged just 18. After a string of fine performances for the Argentine side, Rojo was snapped up by Russian giants Spartak Moscow, but after just 17 appearances, he was sold on to Sporting Lisbon, where he has impressed hugely and now looks like fulfilling the potential he showed at Estudiantes.
Those displays have alerted the likes of Manchester City and Manchester United and predominantly Liverpool to his services, with a potential summer bid in the offing for the defender - but now Arsenal have allegedly decided to take on their rivals and also make a bid for Rojo.
Rojo is expected to start for Alejandro Sabella's Argentina side at the World Cup in Brazil this summer, but not at centre back where he features for Sporting Lisbon - rather, he will be playing at left back, and it's alleged that his versatility is what has made him so appealing to Premier League sides.
And it's certainly what should entice Arsenal. There are still question marks over the future of Thomas Vermaelen, who has offered excellent cover at both centre back and left back behind the likes of Laurent Koscielny, Per Mertesacker and Kieran Gibbs, but with first-team football hard to come by for the Belgian, he could well depart the Emirates Stadium this summer.
Rojo would arrive as the ideal replacement for the former Ajax man, as he would instantly offer the same cover at both centre back and on the left hand side of the Arsenal defence, whilst his relative youth would also lend itself to Rojo becoming a future starter at either position for the Gunners.
It may not seem like a flashy signing, certainly not to the extent of Mesut Ozil's arrival, but Rojo would be a sensible purchase - particularly if Vermaelen leaves the club.