Leicester director of rugby Richard Cockerill admitted he was unhappy with his side's indifferent performance in their 26-5 victory over London Welsh.
The Tigers moved up to fifth in the Premiership table following their triumph at the Kassam Stadium.
Harry Thacker scored two tries for the visitors, Graham Kitchener and replacement Robert Barbieri the others with Tommy Bell kicking three conversions. Bell had taken over the kicking from Freddie Burns, who had a poor match, missing all three kicks and taking a number of wrong options before being substituted.
Cockerill said: "I'll take the five points as that's what we came for but we need to be better than that.
"We've got to be a lot sharper as it was a pretty average performance for we kicked poorly and lacked composure."
It was only 5-5 after 35 minutes as Leicester threw away a number of opportunities to build a healthy lead with outside half Burns missing being replaced after 60 minutes.
"Freddie has never been a top line goal-kicker as he has only around a 65 per cent successful strike rate and he knows he needs to improve," added Cockerill.
Thacker's second try after 38 minutes saw Leicester's forwards take control of the match with Kitchener and replacement Barbieri scoring second-half tries with Bell converting three to complete their scoring.
"We eventually got a foothold in the game and class told but all credit to Welsh as they tackled well and made us struggle," said Cockerill.
Leicester now face an important game against Wasps at home next Saturday as they seek to climb into the play-off spots.
Cockerill said: "This win was something to build on but we need to back it up with a win and a good performance over Wasps next week before we face Toulon. We may have Tom Youngs back to strengthen our side next week."
London Welsh, buoyed by an impressive effort from their new recruit, number eight Opeti Fonua, gave a much-improved show with their defence considerably toughened after conceding more than 70 points at Wasps.
The hosts had stunned the Tigers by taking the lead with a try from wing Nick Scott, and new defence coach, Rowland Phillips was pleased with their improved show.
He said: "We had to improve after last week's showing at Wasps. There is still a lot of work to do but for large parts, we contained the Leicester attack.
"After 20 minutes it was 5-0 to us, then 5-5 after 38; we defended comfortably but once you concede needless penalties to allow good opposition driving-maul positions then you will be in trouble."
Welsh had an excellent new recruit in Fonua, however they did suffer a major blow when Fonua was helped off late in the second half.
"Opeti seems to be fine. He took a knock but is walking round the changing rooms. He had an excellent game for us," said Phillips.
Welsh now face another tough task at home to league leaders, Northampton next Sunday and Phillips hopes to see Olly Barkley and Piri Weepu return for that match.
He added: " Olly Barkley and Piri Weepu are pretty close to being back after injury to be available for selection."