The Portuguese paper reported earlier this week that Southampton scouts were in the crowd to watch the club’s recent 3-0 win over Vitoria Setubal, with John now revealed to be the subject of their visit.
The Dutchman first came to the attention of the likes of Saints boss Ronald Koeman when starring in the Eredivise for FC Twente between 2010 and 2012, scoring nine times in 46 league games before sealing an €9 million switch to the Portuguese giants.
While he struggled to establish himself in the first-team during his first two campaigns at the Estadio da Luz, spending the second half of last season on loan at Hamburg as a result, the talented wide man has since made a crucial breakthrough in recent months to start 12 of the past 13 matches.
His performances haven’t gone unnoticed on the South Coast of England and, after Koeman sealed the loan signing of teammate Filip Djuricic last month, he could now be going back to Portugal in the summer for the one-time capped international.
John, 22, was also linked to Liverpool and Swansea last winter, per the Daily Mail, but it remains to be seen whether either club would reignite their interest in his signature were their Premier League rivals to make a move.
Nevertheless, a switch to Southampton would pose an interesting narrative, considering Saints star Dusan Tadic was in fact brought to Twente from FC Groningen in 2012 in anticipation of John's departure.