Tottenham boss Redknapp: We will not take Young Boys lightly
Spurs were drawn against the Swiss Premier League side at UEFA's base in Nyon on Friday.
"We'll be favourites, obviously, but we have to give them the utmost respect," Redknapp told the Spurs website.
"They beat Fenerbache in the last round and we watched the first leg on dvd and they could have won four or five, they hammered them at home.
"They then went away and won in Turkey and that's a fantastic result.
"There are no easy games at this level. They also have an astroturf pitch at their stadium and they play well on it, so it will be a tough game for us.
"We'll have to be prepared for it but we've Manchester City before that in the Premier League (August 14) and that's the first priority.
"We'll get that one out of the way and then it will be into the Champions League and we've got to try and get into the group stages, that would be fantastic for the club."