"Pre-season doesn't get any easier," says John Fleck as the Blades prepare to wrap up the training camp in Portugal.
The United midfielder is not a big fan of the heat but has been putting the hard yards in with his team-mates.
He told iFollow: "It's about my 10th pre-season and it seems to get worse every year. It has been a lot of hard work in the heat out here.
"The running is always tough but the training has been fun, as well as hard. It has been a bit tougher than last year, but the coaching staff and physios know what they are doing. At times we are fatigued but we are coming through it and will be better for it."
Of the 1-0 victory over Maritimo on Thursday evening, John added: "The game was alright, another 45 minutes for me, we are starting to get our sharpness back. We play Bradford on Tuesday and sharpness will come with every game."