Sussex all-rounder Luke Wright says losing their unbeaten record in the County Championship should not derail their title bid.
The Hove outfit lost to Middlesex by 10 wickets and are now second in the Division One table.
He told BBC Sussex: "We have got to dust ourselves down as it is such a good and competitive league.
"Going into the last games we know we are going to play all the top teams. It will come down to those results."
Sussex are now seven points behind leaders Yorkshire, who have a game in hand, and 12 and a half points ahead of Durham, who have played two games less.
In their final five matches Sussex host the White Rose county and face Durham twice but Wright is remaining optimistic.
"A positive result [against Middlesex] would have been nice but a lot of teams are producing result wickets," he added.
"It will go to those last games. You just have to hope we play better cricket than we did and will be on the right side of those results."
Wright is expected to miss Sussex's three-day tour match with Australia, which starts on Friday, as he is currently carrying a knee injury.
"It was 50-50 whether to play against Middlesex but it was an important game and I didn't want to miss out," he said.
"I have got a few torn fibres in my tendon in my knee. It is a different injury to what I had before. It's a bit of a painful niggle but it won't stop me from playing the rest of the season."
Meanwhile, Sussex wicketkeeper Ben Brown is also likely to sit out the match against the tourists with a broken finger, which he sustained in the defeat to Middlesex.
England Under-19 international Callum Jackson is in line to deputise.