It is believed to be the first head-to-head clash between the two branches of Congress in any sport or recreation.

Among those that reach the midpoint this weekend, six teams are involved in head-to-head clashes for division leads.

In their head-to-head clashes in professional sumo, Gōeidō leads 7-6, including a win by default.

For quality golf, it was the best head-to-head clash on the PGA Tour this year.

If Compaq does indeed show an 80386-based portable, it would set the stage for a head-to-head clash between the makers of this year's most popular new computers.

It would set up an intriguing head-to-head clash next spring between Amazon and Apple; the iPad has so far dominated the tablet computing market.

Things fell flat without his superstar quality, the Diamond League proving a bit of washout without the promise of Bolt in more head-to-head clashes.

With 16 dreadnought-class battleships, compared with the Royal Navy's 28, the German High Seas Fleet stood little chance of winning a head-to-head clash.

In their head-to-head clashes, something elemental is being evoked - some poisonous sense of disparity that continues to divide the sexes, whatever our current protestations of fair play for all.

In a rematch of their unfinished 2004 head-to-head clash, Phil Taylor beat Andy Fordham convincingly in the final, 7-1, to be crowned the first Master of Darts.

Penny, one of four American rowers who boycotted last year's race in a political squabble over team selection, helped clinch Oxford's 12th victory in the last 13 years of the head-to-head clash on the River Thames.

The BAAB, however, will carefully prepare the programme, and could try to avoid major head-to-head clashes before Barcelona like a javelin confrontation between world record holder Steve Backley and his great rival, Jan Zelezny, of Czechoslovakia.