Chelsea chiefs are convinced the spine of their team isn't strong enough.
The Sun says Chelsea will seek a new centre-half signing and centre-forward addition this summer.
The West Londoners spent big last summer under Frank Lampard but that will not stop them dipping into the market again at the end of the season with Thomas Tuchel at the helm.
At the back, the Blues were keen on Bundesliga stars Dayot Upamecano and David Alaba.
But they cooled their interest in Bayern ace Alaba after learning of his £400,000-a-week wage demands.
And he has now agreed to join Bayern with the Germans announcing the £37million transfer on Friday.
Further up the pitch, the West Londoners have been keeping tabs on Erling Haaland since his RB Salzburg days.
But his superb form for Borussia Dortmund since has seen his value sky-rocket and again, his wage demands could prove too much with Kai Havertz and Timo Werner both brought in last summer on huge salaries.
