Arsenal boss Arsene Wenger feels Alexis Sanchez can become a Gunners great.
Thierry Henry, who helped the Gunners to two Premier League titles and three FA Cups, announced his retirement last week at the age of 37.
"He is a fine buy," said Wenger of his £35million purchase from Barcelona.
"In buys of the season in English football he would be up there with Diego Costa at Chelsea.
"He might be as important to us as Thierry Henry one day.
"There are similarities - like both being underestimated and under-used at Barcelona - but Henry has shown that consistent way throughout his career.
"I am confident Sanchez can do that - but he also has to score as many goals as Thierry."