"We need to do some work this week and make sure we finish the season on a high against Reading," he told the club's official website.
"The aim from the start has been to finish in the top ten and the fact we're safe already had no part to play in our performance on Sunday.
"It was just a poor performance all round. That's gone now, we'll have a look at it, see where we went wrong and make sure we're ready for Reading.
"We've done enough to justify being around the top ten so if we can produce a big performance this Sunday we can get there."