I've tried the order process at tennis warehouse for item 4, it automatically deducts 20% from the original price. Is your ordering process different from ours? Would you please with them? Thanks..
Most of their discount functions are offer to the personal customers only because they don't want all their discount items are purchase by the shops or sellers. We ever been complaint to them about it but no use. So you are better to calculate whether buy it from them directly is much cheaper with the 'Friday discount'.