wales critical of clumsy grewcock wales coach mike ruddock says england lock danny grewcock needs to review his actions after he kicked dwayne peel.  trouble flared at a ruck in the first half of wales  11-9 win in cardiff as grewcock came recklessly over the top with his boot  leaving peel bloodied. grewcock was sin-binned with wales captain gareth thomas for retaliation.  it s up to the citing commissioner   said ruddock.  i m not saying it s deliberate  but grewcock did a similar thing for bath against leinster.  last june grewcock was banned from rugby for two months for reckless use of a boot in a match against new zealand.  six years earlier  also in new zealand  grewcock became only the second england player to be sent off in tests. the player himself and his captain jason robinson have both said that the clash with peel was accidental.  if the ball is at the back of the ruck and i feel i can step over and disrupt it then i will do that   said grewcock. but ruddock feels that the england man should be more careful.  the boy himself should look at his actions  it was a clumsy piece of footwork   he said.  he s a great player and i don t want to knock him  we won t be calling for the match commissioner to review the incident.  i m not going to go too far with the lad. it could just be a clumsy action and dwayne had just a minor cut.  the referee s interpretation was that grewcock was attempting to step over the ruck.  ruddock also warned his rbs 6 nations championship rivals that his team can make massive improvements.  we created more opportunities and also squandered them by taking more contact and playing more individually   said the coach.  we ve looked through things on the video debrief and there were definitely a lot of chances that we wasted.  in the forthcoming games  ruddock may use penalty hero gavin henson as his first-choice kicker in place of stephen jones.  our first aim was to get gavin settled into the team  but it s something we ll talk about in selection this week   said ruddock.