That is according to Premier League legend and Arsenal’s record goalscorer Thierry Henry.

Manchester United, Chelsea and Tottenham’s star strikers have started the season on fire.

Lukaku and Morata are joint-top scorers in England’s top flight with six goals each.

Kane, meanwhile, has recovered after another slow August to score four times.

Both Kane and Lukaku are edging nearer to 100 Premier League goals at the age of just 24, and Morata has adapted quickly since arriving from Real Madrid in the summer.

However, Henry - the fifth highest goalscorer in Premier League history - feels none of them have proven themselves properly yet.

“Lukaku has just arrived at Manchester United, he hasn't played long in the Champions League,” Henry said on Sky Sports’ Monday Night Football.

“For Harry Kane, last season was short in the Champions League.

“It was short in the Europa League and the Euros.

"Morata was often off the bench at Madrid. He had a good year at Juve but he was playing with Llorente or Tevez.

“They will get there and we should be happy to have these players in our league.”

One striker he does class at the top level in English football is Manchester City’s Sergio Aguero, who also has six goals already this term.

Henry added: “The only one who is world class, or has been world class, is Aguero because of the longevity of what he has done in this league, year in and year out.

“He won the league here and he has been doing it the longest. You have to give him a bit of credit.

“I think sometimes we bypass Aguero like he didn't happen.”