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Welling's pre-season campaign continued with a home defeat to a strong Millwall team on Tuesday night.
The Lions fielded several first-teamers, including Gary Alexander and Alan Dunne, and raced into a two-goal lead in front of a healthy crowd of 1,103.
Welling fielded a strong starting line-up before ringing the changes after the break.
Luis Cumbers had a goal disallowed for offside before Millwall went ahead in the 17th minute when Alexander's low shot was saved and Kiernan Hughes-Mason tucked home the rebound.
Forward Alexander was involved again in their second goal just after the half-hour, nodding on for Chris Hackett to score from the edge of the area.
Welling pulled a goal back on 35 minutes when Lee Clarke found Jack Oberstellar, who went past his man before firing a delightful goal into the top corner.
Chances were few and far between after the break but Wings boss Jamie Day (pictured), who handed a debut to new signing Loike Pires, had another look at Kane Rice, Jordan Johnson, Anthony Achempong, Femi Omogbehin and Junior Dadson.
Missing from the squad were the injured Andy Sambrook and AFC Hornchurch-bound James Lawson.