England prop Joe Marler has been cited for allegedly striking an opponent in his sides win over Wales on Saturday. The charge relates to an incident in the 15th minute of the first half of the Six Nations match at Twickenham, which was won 25-21 by England.Marler is alleged to have broken Law 10.4 (a), which applies to punching or striking and says a player must not strike an opponent with the fist or arm, including the elbow, shoulder, head or knee(s). In an eventful first half for Marler, the Harlequins loosehead appeared to land a forearm in the face of Wales front row Rob Evans while trying to help team-mate Dan Cole ground the ball over the Welsh try-line. Eddie Jones has hailed Englands attitude after they became Six Nations champions with a game to spare The offence carries an entry-point sanction of two weeks and he will appear before a Six Nations disciplinary hearing this week with the outcome almost certain to rule him out of Saturdays Grand Slam match against France.The citing of Marler follows that of Wales Tomas Francis and Englands James Haskell from the same game, charges which were confirmed on Sunday night.An incident of alleged verbal abuse involving Marler, for which he apologised to Welsh forward Samson Lee on Sunday, is still being investigated.England head coach Eddie Jones told Sky Sports: Joe handled it well. He obviously said the wrong thing, and immediately apologised at half-time, which shows how serious he was about apologising. We have just got to get on with it now.England will bid for a Grand Slam in France on Saturday and, if Marler has to miss the match, Jones is confident the squad has the depth to cope.We have a great situation, he said. Mako Vunipola could step in and start. Him and Joe have been battling all season for that spot, and Matt Mullan can come in on the bench. England prop Joe Marler clashed with Wales front row Samson Lee in the Six Nations fixture Francis appeared to make contact with the eye of England tighthead Cole late in the game and match citing commissioner John Cole has cited him under Law 10.4 (m) - acts contrary to good sportsmanship.If Francis is found guilty at the disciplinary hearing, which will be held this week, be could be looking at a lengthy ban - possibly 12 weeks or more.Haskell, meanwhile, received a citing commissioner warning for a dangerous neck roll tackle in the 16th minute of the contest. 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Hes aiming for a third consecutive win at the Yeongam circuit and, most importantly, a fourth consecutive F1 championship.Mark Petchey believes becoming world No 1 marks Andy Murrays finest achievement in tennis. Murrays march to the final of the Paris Masters, coupled with Novak Djokovics quarter-final exit to Marin Cilic, means the 29-year-old will take over from the Serb at the top of the world rankings on Monday.And Sky Sports tennis expert Petchey, who coached Murray during the early stages of the Scots career, says the three-time Grand Slam winner is finally being rewarded for years of hard work. Andy Murray says hes proud after becoming the world number one, replacing Novak Djokovic after 122 weeks For me its his greatest ever achievement, Petchey told Sky Sports News HQ. Its a lifetime of work for his finest hour. There is so much that goes into being world No 1 anyway, but also at this stage of his career at 29, the fact he has just been behind Novak, Roger [Federer] and Rafa [Nadal] throughout the course of his career, to finally get to the summit of mens tennis underlines just how much Andy is willing to sacrifice and persevere and be patient. Live Tennis: ATP World Tour Finals November 13, 2016, 12:00pm Live on Get Sky Sports Get a Sky Sports pass All those ingredients go in, which is why for me it is his greatest achievement.Petchey is confident Murray will not rest now he is at the summit.The one thing about Andy is he will never relax, Petchey added. He always wants to get better and better and thats why hes become such a great champion. Murray won Wimbledon for a second time in the summer Speaking to his coach Jamie Delgado, after Wimbledon they went doown to the Nadal Academy and his team were just blown away by the work ethic that he put into the training sessions there, after winning Wimbledon.dddddddddddd. That is the reason why this week we see him as world No 1, because there was no let down, he went straight back and worked.Petchey also believes the duel between Murray and Djokovic ensures an exciting end to the season, with both players battling to finish the year as the worlds best player. Novak Djokovic says Andy Murray deserves to become the world number one after raising his level in the last year The fact that the world No 1 is on the line for the World Tour finals is great and will be a spur for both players to produce their best tennis in the next couple of weeks, Petchey added. For Andy, to finish the year as world No 1 is a big deal. Lots of players have won a Grand Slam but failed to get to get No 1 at any stage of their career; there are even fewer players that have ended up year-end No 1 and for Andy to be able to achieve that will be enough of a drive for him continue this fantastic run. Murrays next aim is to end the year as world No 1 When he was 18, he didnt love the hard work. He always loved to play tennis, but now, he loves to work hard physically. He would have had a good career, he was that talented, but he wouldnt have become unique without investing in that hard work and growing on a daily basis to love it. Now hes arguably the hardest worker mens tennis has ever seen.Check our game-by-game updates from Andy Murray v John Isner from the ATP Paris Masters final and then follow his progress at the ATP World Tour Finals from London skysports.com/tennis, our app for mobile devices and iPad and our Twitter account @skysportstennis. Also See: Sky Live: Murray v Isner Murray proud of No 1 ranking Murray worthy of top spot Murray becomes world No 1 ' ' '