Athletics: Coach gives warning to sprint aces.

MAURICE GREENE'S coach rates British sprinters Dwain Chambers and Mark Lewis-Francis as two of the best on the circuit.

But John Smith insists the pair must forget their own personal rivalry and concentrate on the rest of the opposition in tonight's star-studded Gaz de France Golden League meeting in Paris.

The 100 metres at the Stade de France has attracted an impressive field, with world record holder Tim Montgomery -back home in the United States after partner Marion Jones gave birth to their son -the only notable exception.

Smith, recognised as the world's leading sprinting coach,has warned the British duo to pay attention to the classy opposition, which includes Greene, Kim Collins, Deji Aliu, Patrick Johnson and Bernard Williams.

Smith predicted a fast time -weather permitting -but warned: ``They will be given no second chances out there with such a great field against them. ``I just hope they don't just concentrate on one another. This is their chance to prove themselves world class and for their own sakes they must take the opportunity.''

Lewis-Francis leads Chambers 2- 1 in their recent encounters -but Smith believes the duo must keep their eyes wide open if they want to massively enhance their reputations.

Aliu produced a massive upset by relegating Williams and Greene into second and third places in Lausanne on Tuesday but Smith predicts a totally different race in Paris and believes Greene will defend the title he won a year ago ahead of Williams and Lewis-Francis.

CAPTION(S):

CHAMBERS: Rivalry