Mitch Pinnock's late winner gained Dover all three points in a tense 2-1 win against Guiseley at the Crabble Athletic Ground.The midfielder found some extra energy in the last two minutes to beat his man down the left and fire in high past Luke Coddington. It had not look set for a tight affair when the Whites took a fifth minute lead. Anthony Jeffrey surged forward to release Mitch Brundle, who sent a searing 25-yard shot into the top corner.But the Yorkshire side held on well in the second half and levelled when Dayle Southwell struck a free-kick into the top corner past Mitch Walker after 63 minutes.Pinnock's winner however ensured Guiseley's bad run extended to one win in 15.