Tottenham sports chief Damien Comolli is under increasing pressure over his signings.

The Mail on Sunday says Comolli is coming under increasing pressure at Tottenham for sanctioning a near £100million spending spree which has failed to lift the club from the bottom of the Premier League table.

The sporting director is being held responsible for a transfer policy which some blame for the team entering today's match at Portsmouth bottom, two points adrift and a long way from their target of a top-four place.

While Bent is still trying to live up to his price-tag, another expensive Comolli signing, £7.5m defender Younes Kaboul, was allowed to join Portsmouth in the summer, barely a year after being signed. Kevin-Prince Boateng (£6.7m), Ricardo Rocha (£3.2m) and Adel Taarabt (£3m) impressed so little that they have not even been given squad numbers.

Comolli was appointed in September 2005 to replace Frank Arnesen after the Dane moved to Chelsea. Sources close to Spurs have indicated that although it was Comolli who closed the deal which took Dimitar Berbatov to White Hart Lane in 2006, the initial moves were made more than a year earlier by Arnesen.

There are also doubts about other names on the impressive CV Comolli put together during his time as European scout with Arsenal director at St Etienne. Claims he was instrumental in the signing of the likes of Thierry Henry, Robin van Persie and Robert Pires are treated with scepticism at the Emirates Stadium.