And the guard, who is GB's most-capped player, admits that after three weeks on the road, the chance to savour home comforts ahead of the Olympics is a welcome stop: "It's going to be great to come back to Sheffield, go back to my house, which I'm hardly in these days and see some great friends who I know will be at the games.
"Of course, it will be all business against Portugal. We've played them before at EuroBasket last year and we know they are a fiercely competitive side, so we need to be at the top of our game for these next two games."
The ties in Sheffield come ahead of next Thursday's clash with the USA in Manchester.
But Reinking added: "Sure we have the most high-profile nation in the USA facing us next, but we're not thinking of that right now. Our minds are on Portugal and the Olympics."
GB defeated Portugal 85-73 during the initial stage of last summer's EuroBasket in Lithuania but it was a physically challenging encounter.
"They came at us hard, and were aggressive defensively," Reinking recalls.
"Even though they're the only side that we are facing that are not going to the Olympics, they will no doubt give us a test at both ends of the floor."
GB arrive back on home court following two narrow losses to France and Spain but the veteran guard thinks that the team is improving game by game.
"These warm-ups are about testing yourself and getting match fitness," he said.
"It's good to train and work out, but in a game, it's much different and especially as we're playing top sides like Spain, France and the USA, it's a great test not just for yourself but as a team.
"We've played some great basketball as well, despite losing, our ball movement and shooting have been great we just need to close games out, that's all."
GB play Portgual on Saturday and Sunday in Sheffield with both games tipping off at 3pm.