(SPEEDWAY 1)TOP dog Kenneth Bjerre has backed recent signing Norbert Kosciuch to boost Peterborough's play-off bid.The Panthers face chief rivals Swindon tonight in the first of three crucial home matches that could decide the club's title hopes.Peterborough are currently fourth in the Elite League - just one place and one point ahead of the Robins who are their major threat to clinching a top four slot and a passport to the end of season play-offs.Bjerre, who has been in brilliant form all season, said: "Obviously we are battling for fourth place at the moment and it's hard at the top. "First and foremost, we need to make sure we make the play-offs. We're strong enough to beat anybody at home and the play-offs are all over two legs, so if we can get in the top four who knows what might happen."(SPEEDWAY 2)BIRMINGHAM have switched their team plans for three meetings in as many days after the withdrawal of Chris Kerr.Kerr, who suffered a broken leg two months ago, hasn't been back on a bike since the injury and is struggling with the demanding schedule which starts at Edinburgh on Friday.Birmingham boss Graham Drury said: "Chris was due to make his comeback on Wednesday against Sheffield but we were forced to cancel that and he has now informed me he doesn't feel ready for three meetings in three days."(SPEEDWAY 3)BUXTON have been forced into a change of fixture at the Hi Edge Raceway this Sunday.The Hitmen will now face Isle of Wight Islanders in a National Trophy clash as original opponents Mildenhall are looking for new owners to take the club forward.The racing starts at 3pm.(FIXTURES)FRIDAY JULY 16:SKY SPORTS ELITE LEAGUE: Coventry v Poole 8pm, Lakeside v Belle Vue 8pm, Peterborough v Swindon 7.30 PREMIER LEAGUE: Edinburgh v Birmingham 7.30, Scunthorpe v Stoke 7.30 NATIONAL LEAGUE: Newport v Rye House 7pm, Plymouth v Isle of Wight 7.30, Weymouth v Bournemouth 7.15SATURDAY JULY 17:PREMIER LEAGUE: Berwick v Birmingham 7pm, Stoke v Scunthorpe 7.30, Workington v Somerset 7pm BRITISH U-15 CHAMPIONSHIP: Northside 3pmSUNDAY JULY 18:PREMIER LEAGUE: Glasgow v Birmingham 4pm, Newcastle v Somerset 6.30, Newport v Stoke 2.30, Rye House v King's Lynn 2pm NATIONAL LEAGUE: King's Lynn v Dudley 7pm NATIONAL TROPHY: Buxton v Isle of Wight 3pmMONDAY JULY 19:SKY SPORTS ELITE LEAGUE: Belle Vue v Lakeside 7.30, Peterborough v Poole 7.30 ELITE LEAGUE KO CUP QUARTER-FINAL 1st leg: Wolverhampton v Coventry 7.30 WEDNESDAY JULY 21:SKY SPORTS ELITE LEAGUE: Lakeside v Coventry 7.45 ELITE LEAGUE KO CUP QUARTER-FINAL 2nd leg: Poole v Belle Vue 7.30 NATIONAL LEAGUE: Dudley v Isle of Wight (at Birmingham) 7.30