The La Liga giants take on Arsenal this week at the Emirates Stadium in a UEFA Champions League clash.
Henry went onto state that he has been impressed with an ‘incredible’ Ozil this season.
“Ozil is incredible, he has a ton of assists,” Henry told Barcelona’s official website.
“He is playing very, very, very well, as he used to at Madrid. After two very difficult seasons he’s doing very well.
“If you can stop Ozil, Arsenal are practically dead.”
Ozil has been in great form for Arsenal this season and provided the assist for the Gunners last-gasp goal that saw them cut the gap between themselves and league leaders Leicester City to two points.
The 27 -year-old has also created 105 chances for his teammates this season.
Ozil is expected to return to Arsenal’s starting line-up for Arsenal after sitting out for their goalless draw with Hull City on Saturday.