Motor racing: Round-up

Stefan Johannson and Pierluigi Martini, the former grand prix drivers, are to drive the twice Le Mans-winning Joest Porsche in the opening race of the new International Sports Racing Series at Donington Park this Sunday.

Williams team engineers testified in Imola, Italy, on Wednesday that steering column failure was not to blame for Aryton Senna's fatal crash during the 1994 San Marino Grand Prix. Prosecutor Maurizio Passarini, who is trying six Formula One officials for manslaughter, contends that a failure in the modified steering column caused the crash.