McCann's side came out firing on all cylinders in the second-half and doubled their lead two minutes after the restart. Wilder raced down the right flank before turning provider for Mavali, who slotted the ball past Sherlock with relative ease.
The substitute was at it again instantaneously when he won possession inside the Withdean six-yard-box before poking the ball through Sherlock's legs and seeing it trickle over the line to give Hastings what seemed like an unassailable 3-0 lead.
Withdean tried to mount a challenge but Sutton's boys were just not able to find the cutting edge in the final third, despite all their good build-up play and neat passing.
Hastings almost added a fourth goal when substitute Sebastian Kane pounced on a loose defensive pass before racing into the Withdean penalty area. Unfortunately, his shot crashed against the woodwork.
Withdean managed to pull one goal back when Howes failed to collect a cross in his own penalty area cleanly, allowing Rudi Robertson to roll the ball into an open net from close range. Sadly for Sutton and his charges, it was too little too late as Hastings held on to take the win.
After the game, we caught up with McCann to get his thoughts on the win. He said:“A brilliant performance from the lads. Fully deserved in my opinion.
“We stuck to the game plan brilliantly. The lads have trained really well for the last few weeks building up to this game and I know it’s a cliche but, everything went to plan today so I am really pleased with that.”
When asked what he told his team during half-time that resulted in their impressive second-half, McCann said: “We recognised their weaknesses and their strengths and what we needed to lock up and to maintain that winning edge.
“Just keep the fight to win the 1v1s and be first to the ball. I couldn’t have asked for more from them today and what I asked from them, they really delivered out there.
“We’re going to get the coach back together now and it’s an hour and a half on the road. I can imagine it being a very lively trip back, but they deserve it, and I couldn’t be happier for them!”