The Reds lost on penalties to Crystal Palace after being pegged back twice in normal time.
“Obviously mixed (emotions),” said Van Dijk post-match. “First of all, disappointed that we didn’t win the Community Shield. That’s what we came here for.
“There were opportunities to do so, opportunities to avoid it as well. But the reality is today we’re losing.
“It’s the end of our pre-season today as well so we have to be ready now, work our socks off to be ready for Bournemouth.”
The captain continued: “We all have plenty of experience, winning and losing. What kind of impact it should have is that we realise we need a couple of things that we have to improve as a team if we want to retain the title, which obviously will be a very big job in itself.
“We have a recovery day tomorrow and then we fully focus on Bournemouth, which will be a very tough game. But I’m really looking forward to the start of the Premier League.
“Friday at home with our fans, we know it’s going to be emotional obviously with everything that is going on and happened.
“But I’m really looking forward to it.”