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You have probably not heard of Chancel Mbemba. If you know your European football onions – or religiously tune into the Champions League during those long, mid-winter evenings – Aleksandar Mitrovic might prompt a bit more recognition.

How about Kara Mbodji? Or Yarouba Cissako? No? Well welcome to the market Newcastle United will again be shopping in this summer as they plot a kind of close- season reboot.

Newcastle’s recruitment drive is likely to stretch into double figures but the pressure is on Graham Carr more than ever.

Mbemba is a centre-back from Anderlecht, Mbodji is a defender from Genk while Cissako is a right-back who is on loan at Jupiler League side Zulte-Waregem.

Mitrovic, courted by Arsenal and Liverpool too, is a Serbian striker scorching up the scoring charts in Belgium too.

None would cost more than £6million – Mitrovic apart – but all would be expected to replicate the impact of Daryl Janmaat, who cost £4million.

Yet Janmaat was not the only gamble Newcastle took this summer and the jury is out on many of the others. A personal opinion is Remy Cabella will come back next season and prove himself to be a genuine force but Emmanuel Riviere? Even at a relatively cheap £5million he has yet to deliver value.

Ayoze Perez has been a stunning success but Siem de Jong’s injury problems raise questions about due diligence when he was signed.

So make no mistake, this is Carr’s biggest summer.

The United chief scout has a modus operandi he firmly believes in but for two summers running the club has failed to deliver the striker they need.

How are they going to ensure that does not happen this summer?

Releasing unprecedented funds is one way of doing it but at a club where complimentary tickets and press food have been cut back in the last 12 months how likely are they to suddenly break the bank? Lee Charnley will demand value.

All of which comes back on Carr. He has won universal praise for his work during four years but this is his biggest challenge yet. Is he up to it?