(SPEEDWAY 1)WORKINGTON retained the Premier League Fours with an impressive display of heat-leader strength on home soil at Derwent Park on Saturday.Andre Compton was unbeaten throughout the meeting, with Adrian Rymel winning all three of his rides in the Final as the Comets won by nine points.Somerset, inspired by Steve Johnston, finished in second place with Edinburgh snatching third from Berwick in the last race of the night.(SPEEDWAY 2)MARK Lemon's Testimonial meeting has been confirmed for September 18 at his former club Somerset.Lemon, who recently joined Newcastle after being released by Newport, is planning to stage an international team event featuring Australia against the Rest of the World, followed by an individual Final.He said: "I'm determined to put together a top-class rider line-up and a great evening of entertainment for the fans."(FIXTURES)MONDAY JULY 27:SKY SPORTS ELITE LEAGUE: Coventry v Lakeside 7.30, Wolverhampton v Ipswich 7.30

ELITE LEAGUE KO CUP 2nd leg: Belle Vue v Poole 7.30TUESDAY JULY 28:NATIONAL LEAGUE: Isle of Wight v Buxton 7.30