However, in just 25 club appearances in all competitions the 26-year-old struck 13 goals and finished the season in fine form with six in his last nine, including the stunning opener in the Europa League final defeat to Sevilla.
There had been some debate in the last few months as to whether England manager Roy Hodgson should take a gamble on Sturridge's fitness, and the striker has indeed been included in the final squad for this month's tournament in France.
Heskey is certain that was the right decision by the Three Lions boss as he believes Sturridge is a world-class player who offers something "totally different" to any other option at the country's disposal.
The former Reds man told the Sun: "Sturridge is just totally different to anyone. Technically he’s very, very good, he’s got so much skill and he’s one of those players you just enjoy watching.
"He’s world-class, everyone knows that it’s just the injuries, which isn’t his fault. Players get injured and he’s shown that he’s capable of coming back strongly. You’ve got to be strong mentally within football.
"People are always going to question everything you do and everything you say so he’s been able to show he can respond to that. He has to show his form on the pitch and what he’s capable of, no one is really questioning what he can do."
Sturridge will be competing with prolific strikers Harry Kane and Jamie Vardy, along with captain Wayne Rooney and teenage Manchester united prodigy Marcus Rashford for the striker spots for England in France this month.