(CNN) -- Coventry manager Chris Coleman sent out a warning to sixth round opponents Chelsea after his second-flight team sent Blackburn tumbling out of the FA Cup on Tuesday night.
Coventry goal hero Best hugs captain Clinton Morrison at the end of the Blackburn tie.
Leon Best's second half goal at the Ricoh Arena earned Coventry a deserved home tie against Guus Hiddink's men and Coleman said the Premier League giants would not be looking forward to the away trip on March 7.
"They are a great team but it doesn't mean they are unbeatable," he told the Press Association.
"Chelsea will pay us the respect we deserve and rightly so. They won't relish coming here with that type of atmosphere. They are not going to relish that."
Blackburn manager Sam Allardyce fielded a much-changed team for the fifth round replay, clearly concentrating on Premier League survival, and Coventry were the better team for much of the match.
Best -- wearing a face mask to protect a fractured cheekbone -- bravely headed home from Jordan Henderson's cross on 69 minutes to earn Coventry their first FA Cup quarterfinals berth in 11 years.
Tuesday's other FA Cup fifth round replay saw Coventry's fellow Championship side Swansea beaten 2-1 by Premier League Fulham.
Swansea, who came so close to winning the first match at their own Liberty Stadium, took the lead through the prolific Jason Scotland after the break and looked headed for the sixth round.
But American international Clint Dempsey equalized before Bobby Zamora grabbed the winner at Craven Cottage minutes later.
It was the striker's second goal in three days and earned Fulham the daunting task of playing Manchester United for a place in the semifinals.