First team coach and Academy Manager Mike Sandmann spoke to BBC Radio Kent’s Matt Gerrard after the National League South defeat at Crabble on Tuesday.
The defeat ended Dover’s five-game unbeaten run ahead of Saturday’s trip to Bath City.
Ryan Blackman gave Concord a ninth-minute lead before Whites missed an opportunity to get back on level terms just before half-time from the penalty spot after Jordan Higgs was sent flying.
Striker Alfie Pavey, who had previously scored twice from the spot in his past two games, saw his effort beat the keeper but crash into the crossbar.
Concord increased their lead through Nana Kyei four minutes after half-time before Aron Pollock added a third not long after.
Dover Athletic: Nelson, Judd, Paxman (Krasniqi 71′), Goodman, Higgs (Wilkinson 67′), Pavey, Wanadio, Martin, Sterling, Kandi (Grant 58′), Baptiste.
Subs not used: Moses, Carney
Concord Rangers: Minter, Popo, Ramsay, Pollock, Beckett, Blackman (Theobalds 36′), Williamson, Modeste (Hernandez 72′), Kyei (Eyoma 90′), Davies, Manor
Subs not used: Thompson, Tuansaam
ATT: 659