From the back pages, April 23: Robin van Persie inspires United to 20th title glory

Luis Suarez has been charged with violent conduct by the FA after his shameful bite on Branislav Ivanovic. The Liverpool striker has already been fined by his club after sinking his teeth into Chelsea defender Ivanovic in yesterday’s 2-2 Premier League draw at Anfield. (The Sun)

Arsenal have appealed against the red card shown to Olivier Giroud during their Barclays Premier League victory over Fulham on Saturday. (The Times)

British racing faces the most the most serious doping scandal in its history following the disclosure on Monday evening that 11 horses trained by Mahmoud al-Zarooni, one of the powerful Godolphin operation’s two principal trainers, have tested positive for anabolic steroids. All 11, including Certify, a leading contender for the 1,000 Guineas on Sunday week, have been banned for racing for “an extended period of time”. (The Guardian)

McLaren boss Martin Whitmarsh is desperately trying to keep the lid on the simmering feud between Jenson Button and Sergio Perez. (The Mirror)

Mark Clattenburg will referee Chelsea on Sunday for the first time since the club alleged he racially abused John Obi Mikel last year. The FA cleared the referee from using any racist language and the police dropped their own inquiry into the incident during Chelsea’s home defeat by Manchester United on October 28. (Daily Mail)

Barcelona forward Lionel Messi has recovered sufficiently from a hamstring strain to feature in Tuesday’s Champions League semi-final first leg at Bayern Munich, sporting director Andoni Zubizarreta said today. (The Independent)