Harte, who also played for Sunderland and Bournemouth among other clubs, suggested that Arsenal will not be able to win against Barcelona as they failed to beat Hull City.
The Gunners, who are aiming to win the Premier League title this season, were held to a goalless draw by Championship side Hull at the Emirates Stadium in the fifth round of the FA Cup on Saturday afternoon.
Arsene Wenger’s side will return to action on Tuesday evening when they take on Barcelona at the Emirates in the first leg of the Champions League last-16 tie.
Winning against Barcelona even at home will be tough, but one should not forget that Arsenal won against Bayern Munich in North London in the group stage of the Champions League in October.
Barcelona will head into the game at the Emirates as favourites, but an early goal for the Gunners could make things tricky for the defending European champions.