Tottenham boss Harry Redknapp admits there's a big gap between English and Scottish football after victory at Hearts.
Redknapp, who said he would make changes for next week's return leg, was hesitant to criticise Scottish football, but explained the gap in class was self-evident.
He said: "I don't want to be disrespectful to Scottish football, but there is obviously a big gulf. It's plain for anybody to see.
"It is a different level now, for sure - it's pretty obvious. Resources are completely different.
"I've seen some good games, but there's a difference - you look at the money the players earn in the Premier League and the money that's paid in transfers, there's got to be a gulf.
"Listen, we had a good day. We could come here again and it could be different.
"First half we played ever so well and it was difficult for them."
