DOHA : Teenager Jude Bellingham has become one of the most sought-after signatures in football and a display oozing class in England's 6-2 rout of Iran in their World Cup opener may have considerably upped Borussia Dortmund's asking price.The 19-year-old central midfielder made his World Cup finals bow look like a walk in the park inside the Khalifa International Stadium, serving up a thoroughbred performance that set the tone for England's dominant Group B victory.England manager Gareth Southgate had come under fire during a six-game winless run in the Nations League ahead of the World Cup - his sides lacking fluidity and forward thrust.But a few shuffles to his formation on Monday, notably a four-man defence with Declan Rice in front as a holding midfielder and advanced full backs, provided the stage for Bellingham to run amok through Iranian ranks.Covering the lush turf between the penalty areas like a high-powered sports car, Bellingham provided both a link out from defence and a late-arriving threat at the other end.He was at the heart of a first half of total England domination and it was fitting that he opened the scoring in the 35th minute with a textbook header from Luke Shaw's cross after ghosting into space inside the area.It made Bellingham the youngest England scorer at a World Cup since Michael Owen in 1998 and the first player born in 2000 or later ever to score in the finals.TELLING STATISTICPerhaps the most telling statistic, however, was that the former Birmingham City player completed 40 out of 40 passes in the opening half, 10 of them in the final third of the pitch.Bellingham, who Liverpool are reportedly willing to spend 100 million pounds ($118 million) on to bring to the Premier League, produced a