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Ten races exclusively live on Sky Sports F1 in 2014
Your essential rundown of all that's different in 2014 - the drivers, venues, cars, rules and points scoring.
Listen to the latest from the NFL as our Neil Reynolds and Jeff Reinebold preview free agency.
Video interviews with all the leading trainers ahead of this week's Cheltenham Festival.
Pictures from Dublin as Brian O'Driscoll bade an emotional farewell to the Ireland supporters.
Netball London Live served up a thriller as Storm beat Mavericks at the Copper Box.
Harlequins have named four changes to their side ahead of Saturday's Aviva Premiership clash against Northampton Saints at the Twickenham Stoop.
Tom Casson comes into the side at centre to partner George Lowe having missed out on the win against Worcester Warriors two weeks ago.
In the forward line Rob Buchanan starts at hooker while Tom Guest comes in to replace Maurie Fa'asavalu in the back row.
England captain Chris Robshaw is unavailable having picked up a knock against Worcester but Harlequins coach Conor O'Shea expects the forward to be fit to feature in next week's Premiership semi-final.
The visiting Northampton Saints have also made four changes to their squad which beat Sale time out to secure a play-off position.
George Pisi returns to the starting XV at outside centre in place of Tom May as the Saints look to leapfrog Harlequins in the Premiership standings.
In the pack Samu Manoa takes the number eight jersey ahead of GJ van Velze who is demoted to the bench while Calum Clark returns in the flanks to partner Tom Wood.
Both sides head into the clash with back-to-back wins and just one point between them meaning the victor will take third place in the Premiership table.
Harlequins: 15 Mike Brown, 14 Tom Williams, 13 George Lowe, 12 Tom Casson, 11 Ugo Monye, 10 Nick Evans, 9 Danny Care, 8 Nick Easter, 7 Luke Wallace, 6 Tom Guest, 5 George Robson, 4 Olly Kohn, 3 James Johnston, 2 Rob Buchanan, 1 Joe Marler.
Replacements: 16 Joe Gray, 17 Mark Lambert, 18 Will Collier, 19 Charlie Matthews, 20 Maurie Fa'asavalu, 21 Karl Dickson, 22 Ben Botica, 23 Ross Chisholm.
Northampton: 15 Ben Foden, 14 Ken Pisi, 13 George Pisi, 12 Luther Burrell, 11 Jamie Elliott, 10 Stephen Myler, 9 Lee Dickson, 8 Samu Manoa, 7 Tom Wood, 6 Calum Clark, 5 Christian Day, 4 Courtney Lawes, 3 Brian Mujati, 2 Dylan Hartley (capt), 1 Soane Tonga'uiha.
Replacements: 16 Mike Haywood, 17 Alex Waller, 18 Tom Mercey, 19 Phil Dowson, 20 GJ van Velze, 21 Martin Roberts, 22 Ryan Lamb, 23 James Wilson.
"At this stage of the season it is all about trying to build some momentum and get into a the habit of winning.
"We have had a great season, we had a little blip after Christmas during the Six Nations when we lost our top of the table spot but if you look back at the results our percentage of wins is really high."
"It's a chance to play against a top side, to test ourselves as best as we can and see where we stand at the end of the game.
"We're going to be coming up against another good team in the semi-final and potentially another one in the final."
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|Friday 21st March|
|19:45||Worcester vs Wasps|
|Saturday 22nd March|
|14:00||Sale vs Northampton|
|15:00||Gloucester vs Newcastle|
|15:15||Saracens vs Harlequins|
|17:30||London Irish vs Bath|
|Sunday 23rd March|
|14:00||Leicester vs Exeter|
|Friday 28th March|
|19:45||Bath vs Sale|
|Saturday 29th March|
|15:00||Wasps vs Saracens|
|15:00||Harlequins vs London Irish|
|15:00||Exeter vs Gloucester|
|15:15||Northampton vs Leicester|
|Sunday 30th March|
|14:00||Newcastle vs Worcester|
|Friday 11th April|
|19:45||Sale vs Harlequins|
|Saturday 12th April|
|15:00||Worcester vs Exeter|
|15:00||Leicester vs Wasps|
|15:15||Gloucester vs Bath|
|Sunday 13th April|
|14:00||Saracens vs Northampton|
|15:00||London Irish vs Newcastle|
|Friday 18th April|
|19:45||Harlequins vs Leicester|
|Saturday 19th April|
|15:00||Bath vs Worcester|
|15:00||Exeter vs Sale Sharks|
|15:15||Wasps vs Gloucester|
|Sunday 20th April|
|14:00||Northampton vs London Irish|
|15:00||Newcastle vs Saracens|
|Saturday 3rd May|
|15:00||Bath vs Northampton|
|Sunday 2nd March|
|Newcastle 18 - 41 Leicester|
|Saturday 1st March|
|Northampton 39 - 13 Gloucester|
|Exeter 18 - 0 London Irish|
|Harlequins 21 - 20 Worcester|
|Wasps 17 - 21 Sale Sharks|
|Friday 28th February|
|Bath 10 - 23 Saracens|
|Sunday 23rd February|
|Saracens 23 - 10 Exeter|
|Newcastle 16 - 22 Northampton|
|London Irish 15 - 20 Leicester|
|Saturday 22nd February|
|Worcester 12 - 24 Sale Sharks|
|Bath 32 - 25 Wasps|
|Gloucester 25 - 20 Harlequins|
|Sunday 16th February|
|Leicester 11 - 8 Gloucester|
|Saturday 15th February|
|Exeter 23 - 27 Bath|
|Wasps 20 - 23 London Irish|
|Northampton 30 - 14 Worcester|
|Harlequins 18 - 14 Newcastle|
|Friday 14th February|
|Sale Sharks 10 - 15 Saracens|
|Sunday 9th February|
|Harlequins 11 - 10 Wasps|
|Saturday 8th February|
|Exeter 16 - 17 Northampton|
|Saracens 13 - 22 London Irish|
|Bath 24 - 6 Newcastle|
|Friday 7th February|
|Sale Sharks 24 - 19 Gloucester|
|Worcester 22 - 23 Leicester|
Read the thoughts and opinions of Stuart Barnes with skysports.com