Apr 1 FOOTBALL - Johnstone's Paint Trophy final.

Apr 1 WORLD SUPERBIKES - Donington Park.

Apr 1 BASEBALL - Major League season begins.

Apr 3 FOOTBALL - Champions League quarter-final first leg.

Apr 5 FOOTBALL - UEFA Cup quarter-final first leg.

Apr 5-8 GOLF - US Masters.

Apr 6-8 TENNIS - Davis Cup quarter-finals.

Apr 8 FORMULA ONE - Malaysian GP.

Apr 8 ICE HOCKEY - NHL regular season ends.

Apr 8 BASKETBALL - BBL Championship regular season ends.

Apr 9-15 TENNIS - WTA Family Circle Cup, Charleston.

Apr 11 FOOTBALL - Champions League quarter-final second leg.

Apr 12 FOOTBALL - UEFA Cup quarter-final second leg.

Apr 14 RACING - Grand National, Aintree.

Apr 14 FOOTBALL - FA Cup semi-finals.

Apr 14 FOOTBALL - Tennent's Scottish Cup semi-finals.

Apr 15 FORMULA ONE - Bahrain GP.

Apr 15 RUGBY UNION - EDF Energy Cup Finals Day, Twickenham.

Apr 15 A1GP - China.

Apr 15 WORLD SUPERBIKES - Valencia.

Apr 16-22 TENNIS - ATP Monte Carlo Masters, Monte Carlo.

Apr 18 CRICKET - Liverpool Victoria County Championship starts.

Apr 18 BASKETBALL - NBA regular season ends.

Apr 19-22 EQUESTRIAN - Showjumping World Cup finals, Las Vegas.

Apr 20-22 RUGBY UNION - Heineken Cup semi-finals, European Challenge Cup semi-finals.

Apr 21 RACING - Scottish Grand National, Ayr.

Apr 21-May 7 SNOOKER - 888.com World Championship, Sheffield.

Apr 21-22 TENNIS - Fed Cup, 1st round.

Apr 21 BASKETBALL - NBA play-offs begin.

Apr 22 CRICKET - Friends Provident Trophy Group Stages start.

Apr 22 ATHLETICS - Flora London Marathon.

Apr 22 MOTO GP - Turkish GP, Istanbul.

Apr 24 FOOTBALL - Champions League semi-final first leg.

Apr 24 CRICKET - World Cup first semi-final, Jamaica.

Apr 25 CRICKET - World Cup second semi-final, St Lucia.

Apr 26 FOOTBALL - UEFA Cup semi-final first leg.

Apr 28 RACING - Betfred Gold Cup, Sandown Park.

Apr 28 CRICKET - World Cup final, Barbados.

Apr 28 RUGBY UNION - Guinness Premiership regular season ends.

Apr 29 A1GP - Great Britain.

Apr 29 WORLD SUPERBIKES - Assen.