Apr 2 - RACING - Freephone Stanleybet Lincoln (Doncaster).

Apr 2-3 - RUGBY LEAGUE - Powergen Challenge Cup fourth round.

Apr 2 - AMERICAN FOOTBALL - First round of NFL Europe matches.

Apr 3 - FORMULA ONE - Bahrain Grand Prix.

Apr 3 - MOTORCYCLING - World Superbikes (Philip Island).

Apr 5-6 - FOOTBALL - Champions League, quarter-final first leg.

Apr 7 - RACING - Martell Cup (Aintree).

Apr 7 - FOOTBALL - UEFA Cup, quarter-final first leg.

Apr 7-10 - GOLF - US Masters (Augusta).

Apr 8 - RACING - John Hughes Trophy, Martell Melling Chase (Aintree).

Apr 8-10 - RALLYING - Rally New Zealand.

Apr 9 - CRICKET - Opening day of county cricket season, MCC v Warwickshire (Lord's).

Apr 9 - RACING - Martell Grand National, Martell Hurdle (Aintree).

Apr 9-10 FOOTBALL - Tennent's Scottish Cup semi-finals.

Apr 10 - FOOTBALL - LDV Vans Trophy final.

Apr 10 - MOTORCYCLING - MotoGP (Jerez).

Apr 10 - BASKETBALL - Final round of matches in the BBL Championship.

Apr 10 - ICE HOCKEY - NHL regular season ends.

Apr 10 - ICE HOCKEY - Elie League Play-off Championship final.

Apr 12 - RACING - Nell Gwyn Stakes (Newmarket).

Apr 12-13 - FOOTBALL - Champions League, quarter-final second leg.

Apr 13-16 - CRICKET - First round of Frizzell County Championship matches.

Apr 13 - RACING - European Free Handicap, Earl of Sefton Stakes (Newmarket).

Apr 14 - FOOTBALL - UEFA Cup, quarter-final second leg.

Apr 14 - RACING - Craven Stakes, Feilden Stakes (Newmarket).

Apr 16 - FOOTBALL - FA Cup semi-finals.

Apr 16 - RUGBY UNION - Powergen Cup final (Twickenham).

Apr 16 - RACING - Scottish Grand National (Ayr).

Apr 16 - RACING - Greenham Stakes, Fred Darling Stakes (Newbury).

Apr 16-May 2 - SNOOKER - Embassy World Championships.

Apr 17 - CRICKET - First round of totesport League matches.

Apr 17 - ATHLETICS - Flora London Marathon.

Apr 17 - MOTORCYCLING - MotoGP (Rio de Janeiro).

Apr 20 - BASKETBALL - NBA regular season ends.

Apr 22-24 - RUGBY UNION - Heineken Cup semi-finals.

Apr 22 - RACING - Sandown Classic Trial (Sandown).

Apr 23-24 - TENNIS - Fed Cup first round.

Apr 23 - RACING - Betfred Gold Cup (Sandown).

Apr 23 - BASKETBALL - NBA Playoffs begin.

Apr 24 - FORMULA ONE - San Marino Grand Prix (TBC).

Apr 24 - MOTORCYCLING - World Superbikes (Valencia).

Apr 26-29 - RACING - Punchestown Festival.

Apr 26-27 - FOOTBALL - Champions League, semi-final first leg.

Apr 28 - FOOTBALL - UEFA Cup, semi-final first leg.

Apr 29-May 1 - RALLYING - Rallye Italia.

Apr 30 - RACING - 2000 Guineas, Palace House Stakes (Newmarket).

April 30-May 1 - RUGBY UNION - Zurich Premiership regular season ends.