Owen Farrell is one of three England superstars who can be targeted by Wales in Saturday's huge showdown at the Principality Stadium.
Former Wales captain Gwyn Jones feels the England captain's lack of game time for Saracens, indiscipline and stuttering form are weak points Wayne Pivac's men should seek to capitalise upon as they chase the Triple Crown.
Respected pundit Gwyn also believes Farrell's Sarries team-mates, Maro Itoje and Billy Vunipola, are vulnerable heading into the Six Nations game.
Those three are the leaders of the England team, at their best true world-class talents who have been the main inspiration behind success at club and country level.
But Gwyn argues they are short of their best at the moment, with Saracens' demotion to the English Championship and the fact the three went into the Six Nations undercooked having a clear impact on their performance levels.
Eddie Jones' England lost at home to Scotland in their opening game and although they comfortably defeated Italy at Twickenham in round two, leading referee Nigel Owens believes they could easily have had three tries ruled out.
Farrell was seen remonstrating with the referee during the Scotland defeat, with his tackle technique under scrutiny again, and has not looked at his sharpest best at 10 or 12.
Itoje has given away penalties, while blockbusting number eight Vunipola openly admits his form hasn't been good enough.
In his pre-match column for the Western Mail and Wales Online (which you can read in full here ), Gwyn says Wales nullifying the England pack holds the key to the outcome of the match.
"Not that they have shown anything to be overly worried about in their first two games," he writes of England.
"Their three big momentum players, Maro Itoje, Billy Vunipola and Owen Farrell have been indisciplined or lethargic. All three are under pressure to improve and I wonder if that desperation will make them try too hard.
"All three are short on rugby and without the confidence of their club form to fall back on; if Wales can put them under pressure, will they force things too much and make mistakes?"
Gwyn admits he still fears an England victory, despite their faltering start, but says it will be really close.
"There is not much in it and no-one would be surprised if Wales pulled off another unlikely win," he concludes.
Gwyn Jones and fellow WalesOnline columnist Nigel Owens will be commentating on the big game at the Principality Stadium as S4C's star pundits.