Wednesday continued their summer schedule with a 2-1 reverse at Mansfield on Tuesday evening.
Mal Benning gave the hosts the lead just before the break and an Adam Reach own goal made it 2-0.
Reach made amends to halve the arrears but Mansfield held on to take the plaudits.
But from the first whistle, it was the Owls that assumed control as the Stags struggled to gain possession.
Moving the ball around neatly and with pace, Wednesday seemed to have too much for their fourth tier opponents.
But as the contest unfolded, the home side grew into proceedings and went close midway through the first half when CJ Hamilton ghosted in at the back post but Morgan Fox got a vital touch.
The same duo locked horns again ten minutes later, with Fox coming out on top once more, this time deflecting wide for a corner.
And from the corner kick Mansfield went closer still, albeit through Atdhe Nuhiu, whose header was bound for the top corner but for a flying Cameron Dawson save.
Liam Palmer, Sam Hutchinson and Nuhiu had the best efforts for Wednesday, who went behind four minutes before half time.
After Palmer bravely blocked a fierce drive from Olis Khan, the ball fell kindly to Benning, who smashed home off the inside of the far post.
The Owls started the second half as they did the first and came within a whisker of levelling on 49 minutes.
Forestieri found Palmer down the right whose cross was aimed accurately into the path of Nuhiu, who struck the crossbar from close range.
Play was relatively even thereafter until the Stags broke forward and doubled their lead on 67 minutes.
Alex MacDonald executed a perfect through-ball out wide for Hamilton, whose cross was inadvertently diverted into his own goal by Reach.
And it was Reach who pulled a goal back with 18 minutes to go. Taking a cleared feed from Palmer into his stride, the former Middlesbrough man drilled hard and low past Conrad Logan.
Wednesday pressed for an equaliser and saw a penalty claim waved away after Forestieri tangled with Hamilton in the box.
Tyler Walker forced Dawson into a fine save before an unsavoury melee at the end saw a brawl with a raft of players at its heart.
Wednesday: Dawson, Palmer, Lees, van Aken, Fox, Reach, Pelupessy, Bannan, Hutchinson, Forestieri, Nuhiu
Attendance: 3.599