Millwall boss Neil Harris was delighted with The Lions' "excellent" performance and fitness levels in Saturday's 1-0 win over VfL Bochum.
The match, celebrating the Millwall career of Jimmy Abdou, saw Harris' men win the game through a thumping first half strike by Jed Wallace.
Speaking to millwallfc.co.uk, the manager stated that places were up for grabs ahead of next Saturday's Sky Bet Championship opener against Middlesbrough and was pleased with his "disciplined" side against a "top draw" Bochum opposition.
"Today we played it like the occasion it was, a testimonial for Jimmy," he said. "I said to the players that I wanted to do him right.
"It was our first time back at The Den and I told the players that there will be a sprinkle of the team next Saturday, places are up for grabs - it's down to them to grab the opportunity.
"I thought the performance was excellent and fitness levels were superb. It was the workout I expected. I saw that Bochum team beat Stoke a couple of weeks ago and they were outstanding. I thought their use of the ball and their movement was top draw - as good as we'll see in The Championship this year.
"But, we looked disciplined. The boys have worked hard over the last five weeks. It was a good marker for us going into Middlesbrough next week."
Wallace netted his fourth goal of pre-season in the 41st minute, with The Lions creating a host of other chances in their attempts to extend the lead.
"I thought it was a very good goal and we got ourselves into some very dangerous areas," Harris continued. "We hit the bar, had chances in the second half and Aiden [O'Brien] could - or should - have had one. It was a Millwall-like performance, we had to soak up pressure and be disciplined, but when we got the ball we looked a real handful.
"The energy levels were really good. I'm really pleased for Jed, it was a great strike. It was a very good goal from us - the build-up play, the decision-making, the amount of passes we made, the area we got into and then the bit of quality around the box that Jed provided."