Both Aviva Premiership semi-finals are to be shown live on BT Sport 1 on Saturday.Only four of the 21 previous Premiership Rugby semi-final matches have been won by away sides – by Leicester Tigers at Gloucester in 2008, London Irish at Harlequins in 2009, Saracens at Northampton in 2010 and Northampton Saints at Saracens in 2013. First up on Saturday is Saints v Saracens with coverage from 1.30pm and kick-off at 2pm on BT Sport 1. Defending champions Northampton have reached a sixth successive semi-final, three of which have been at home. They have taken 47 league points from their 11 home games in the competition. In seven Premiership semi-finals Saints lost the first five but have won the last two, at Saracens and against Leicester Tigers last season. Saracens have also reached a sixth successive semi-final. The two clubs have met in seven previous semi-finals in all tournaments, Saints having a slight edge by four wins to three, although Saracens knocked Northampton out of the LV= Cup at this stage in March. Saints have won their last three Aviva Premiership matches against Sarries. The second semi-final sees Bath Rugby at home to Leicester Tigers.  Coverage will continue on BT Sport 1 with kick-off at 5pm. Bath are in their first play-off since 2010 and The Recreation Ground becomes the 10th venue to host a Premiership Rugby semi-final. Bath are chasing a place in their first Premiership Final since 2004. They have won their last six Aviva Premiership matches and have not won seven in a row since 2009/10. Leicester Tigers have reached the play-off stages for an 11th successive season with their only loss in the last nine rounds of Aviva Premiership rugby coming at Saracens in Round 19. TV coverage of the Aviva Premiership Rugby semi-finals Live Saturday Northampton Saints v Saracens, programme starts at 1.30pm, BT Sport 1 kick-off 2pm Bath Rugby v Leicester Tigers, kick-off 5pm   Highlights Sunday ITV4 9pm & ITV 11.15pm Monday ITV4 midnight Rugby Tonight Monday 8pm, BT Sport 2 Rugby Tonight Extra Thursday 28 May 11.15pm, BT Sport 1