Portuguese journalist Alberto da Silva, who works for Abola, believes Bosingwa has been overvalued by Chelsea.
"He's a good player but he's not worth that much money," he told BBC Radio 5 Live.
"I think Chelsea's current right-back Paulo Ferreira is a better player. I don't know who negotiated the deal, but he did well for Porto."
Three years ago, Bosingwa was involved in a serious car accident along with four other footballers.
All survived, but Sandro Luis, from a minor Portuguese side, had to have his left foot amputated as a result of the accident.
Bosingwa's arrival at Stamford Bridge will cast doubt over the future of another right-back Juliano Belletti.
The former Barcelona defender, who scored the winning goal in the 2006 Champions League final against Arsenal, has been overlooked by Blues manager Avram Grant in recent weeks, with Michael Essien occupying the full-back berth.
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