Apr 1 - RACING - Martell Cup, Aintree.

Apr 1-5 - CRICKET - Bridgetown: West Indies v England, 3rd Test.

Apr 2 - RACING - John Hughes Trophy, Aintree.

Apr 3 - RACING - Martell Grand National, Aintree.

Apr 3 - ICE HOCKEY - Elite League play-off semi-finals.

Apr 3-11 - SNOOKER - Glasgow: The Players' Championship.

Apr 4 - FOOTBALL - FA Cup semi-finals.

Apr 4 - FORMULA ONE - Bahrain Grand Prix.

Apr 4 - ICE HOCKEY - NHL regular season ends.

Apr 4 - ICE HOCKEY - Elite League play-off final.

Apr 5 - BASEBALL - Major League regular season starts.

Apr 6-7 - FOOTBALL - UEFA Champions League quarter-finals, 2nd leg.

Apr 8 - FOOTBALL - UEFA Cup quarter-finals, 1st leg.

Apr 8-11 - GOLF - Augusta: US Masters.

Apr 9/10/11 - RUGBY UNION - Heineken Cup Quarter-Finals.

Apr 10-14 - CRICKET - St Johns: West Indies v England, 4th Test.

Apr 10-11 - FOOTBALL - Tennent's Scottish Cup semi-finals.

Apr 11 - BASKETBALL - British Basketball League Championship regular season ends.

Apr 12 - RUGBY LEAGUE - National League season starts.

Apr 13 - RACING - Nell Gwyn Stakes, Newmarket.

Apr 14 - RACING - Earl of Sefton Stakes, Victor Chandler European Free Handicap, Newmarket.

Apr 15 - RACING - Feilden Stakes, Macau Jockey Club Craven Stakes, Newmarket.

Apr 14 - BASKETBALL - NBA regular season ends.

Apr 14 - FOOTBALL - UEFA Cup quarter-finals, 2nd leg.

Apr 16 - CRICKET - Frizzell County Championship begins.

Apr 16-18 - RALLYING - Rally of New Zealand.

Apr 17 - RUGBY UNION - Twickenham: Powergen Cup Final.

Apr 17 - RACING - Lane's End Greenham Stakes, Dubai Duty Free Fred Darling Stakes, Dubai Irish Village John Porter Stakes, Newbury, Gala Casinos Daily Record Scottish Grand National, Ayr.

Apr 17 - BASKETBALL - NBA play-offs begin.

Apr 17 - HOCKEY - English Hockey League regular season ends.

Apr 17-May 3 - SNOOKER - Sheffield: Embassy World Championship.

Apr 18 - CRICKET - Georgetown: West Indies v England, 1st ODI.

Apr 18 - RUGBY LEAGUE - Powergen Challenge Cup semi-final.

Apr 18 - ATHLETICS - Flora London Marathon.

Apr 18 - MOTORCYCLING - Welkom: South African MotoGP.

Apr 18 - MOTORCYCLING - Misano, San Marino: World Superbikes.

Apr 20-21 - FOOTBALL - UEFA Champions League semi-finals, 1st leg.

Apr 22 - FOOTBALL - UEFA Cup semi-finals, 1st leg.

Apr 23 - RACING - Sandown Park Classic Trial, Sandown.

Apr 24 - RACING - attheraces Gold Cup, attheraces Gordon Richards Stakes, attheraces Mile, Sandown.

Apr 24 - AMERICAN FOOTBALL - NFL College Draft, Madison Square Garden, New York.

Apr 24 - CRICKET - Port of Spain: West Indies v England, 2nd ODI.

Apr 24/25 - RUGBY UNION - Heineken Cup Semi-Finals.

Apr 25 - CRICKET - Port of Spain: West Indies v England, 3rd ODI.

Apr 25 - CRICKET - National League begins.

Apr 25 - FORMULA ONE - San Marino Grand Prix.

Apr 25 - AMERICAN FOOTBALL - NFL College Draft, Madison Square Garden, New York.

Apr 25 - RUGBY LEAGUE - Powergen Challenge Cup semi-final.

Apr 28 - RACING - Sony Victoria Cup, Bovis Homes Sagaro Stakes, Ascot.

Apr 28 - CRICKET - Grenada: West Indies v England, 4th ODI.

Apr 29-May 2 - EQUESTRIAN - Badminton Horse Trials.