"If my contract had been up at the end of last season, I'd have knocked it on the head," added the 33-year-old.
Cueto, who was
capped 55 times by England
between 2004 and 2011, continued: "If the season goes well, my body feels good and I feel I can contribute at the right level, I'll potentially look at another year."
"I remember this time last year and I couldn't kneel on the ground for my [pre-season] photo because my knee was that sore," revealed Cueto, who is the Premiership's all-time leading try scorer with 78.
"I carried it all last season and, because you're turning out week-in and week-out, people don't realise where you're at."
International commitments, followed by his troublesome knee, had prevented Cueto from participating in a full pre-season schedule for several years until this summer, but an extended rest has helped him return to full fitness.
"We had six weeks off and that's probably the longest rest I've been able to give my body since I started," he said.
"Then I've done eight or nine weeks of pre-season, which has been brilliant. I feel as good as I have for a long time."
Sale endured a
miserable start to the 2012-13 campaign
but recovered under the stewardship of Steve Diamond, their third director of rugby of the season after Bryan Redpath and John Mitchell, to finish 10th in the final Premiership table and well clear of relegated London Welsh.
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