Millwall boss Neil Harris was pleased with The Lions' fitness levels during their 5-0 win over Dartford at Princes Park on Saturday afternoon.
On a sweltering day in Kent with temperatures touching 31 degrees, Jed Wallace (2), Aiden O'Brien, Mahlon Romeo and Steve Morison were on target as the manager fielded a separate side in each half to begin pre-season.
Next up for The Lions is the trip to Portugal, followed by friendly matches against Cambridge and Colchester United before the season's opener versus Middlesbrough at The Den on Saturday 4th August.
"Presuming we got through the 90 minutes with no injuries, then it's a good day," the boss told millwallfc.co.uk. "The boys have worked really hard for two weeks, so to come and get 45 minutes under their belt in a competitive game is good for them.
"It's good for us to see some patterns we've worked on with the ball at times this week come to fruition, especially during the first half. I think it was very difficult for the second half team to get going because of the heat and the fact they'd been sitting around for two hours before going on the pitch.
"We were a lot more fluent in the first half, but credit to Dartford who kept going and caused us problems in both halves."
New signing Murray Wallace made his debut in the second half, whilst the afternoon also saw Byron Webster make his first appearance in 10 months after recovering from a long-term injury.
The manager added his delight and seeing the latter in a Millwall shirt once more, whilst also praising the first half performance.
"I'm delighted for Byron Webster to get 45 minutes - that's key for him and his confidence. It's going to take a while for him to come up to match speed but it's good for him to get some minutes.
"I thought there were some really good goals. The pace and quality we showed on the counter-attack and the movement was outstanding. At times we made it very difficult for Dartford and that was just by the player's intelligence, picking the right pass and then having the end product.
"We could've had a couple more in the first half if we were a bit more ruthless around the box, whilst in the second half I think we lacked a bit of creativity.
"Our fitness levels look very good and over the course of the next four weeks, it's just about getting minutes on the pitch. We want to see examples of what we've worked on and want to see progression."