According to midweek figures, Elton's duet with Blue, Sorry Seems To Be The Hardest Word, is outselling the competition in the race for the top spot.
Gareth Gates looks set to hit a career low this week with his new single expected to miss the top five of the UK singles chart.
The Pop Idol star, whose previous three singles have debuted at No.1, is expected to chart at number six with his latest offering, What My Heart Wants To Say.
Transylvanian twins, The Cheeky Girls, should remain at number two with rap star Eminem expected to fall to number three.
Elsewhere, British solo stars Daniel Beddingfield and Robbie Williams will fight it out for positions four and five.Unreptent Elton is not Sorry to defend Sorry - Thursday, December 12 2002 at 15:40:40Tantrum in a Mirror - Tuesday, December 10 2002 at 15:58:56Shop latest: Mozart suit turns Blue - Tuesday, December 10 2002 at 14:55:55UPDATE: Blue goes to court to fight "imposter" boyband - Thursday, November 14 2002 at 07:06:30EXCLUSIVE: Original Sin as Elton records with controversial boyband Blue - Thursday, October 24 2002 at 02:30:30