Mark Schwarzer in the visitors' goal was forced to palm a Christian Gentner shot from 16 yards past the post and only a linesman's flag prevented Grafite levelling with a follow-up effort from an initial shot from Andrea Barzagli.
Webster moved alongside Manassero with a seven-under 64 which included a spectacular eagle at the par-five 13th, which saw his second shot from a fairway bunker strike the flag, leaving him with a six-foot putt for his three.
Watford equalised when Mingoia, one of seven academy products in the home line-up, picked up the ball by the corner flag before cutting inside to smash a shot into the top corner.
The highlight of his round was a stunning 207-yard approach shot on the 15th which landed four feet from the flag, giving him the chance to convert a simple eagle putt.
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The Swiss brought on Hakan Yakin at half-time but his first contribution was a long-range shot which almost hit the corner flag.
The Everton youngster linked up well with Kenny Miller after brilliantly beating two men near the corner flag before setting up the Wolves striker for a shot that was sliced well off target.
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It's the only way I can post it on this blog but in the interest of full disclosure, you should know that there's a third flag - the European Union flag - just out of shot.
Garcia plays a magnificent sixth hole, landing his second shot to within inches of the flag on his way to reducing the deficit.
Roque Santa Cruz shot wide and later passed for Benni McCarthy to slot home only for a questionable offside flag to rule the goal out.
He had a one-shot lead as he stood in the 18th fairway, some 240 yards from the flag with trouble in the way in the shape of large lake.
Then an approach shot on the 15th hole Friday deflected off the flag and into the water, which led to a drop.
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