Barcelona’s Gerard Pique (left) and team-mates applaud fans after winning their Champions League 1st leg last 8 match on Tuesday. AFP
Luis Suarez's 12th minute back-post header was deflected past David de Gea by United left-back Shaw.
The Argentina star has already been ruled out of the team's trip to Florida for a one-off friendly against Napoli in Miami on Wednesday.
The five-time European champions will face either Liverpool or Porto in the last four in their first appearance at the stage of the competition since 2015.
Horse racing returned after more than two months in England on Monday, but was beaten to the chase by pigeon racing as the first sport to restart following the easing of coronavirus lockdown restrictions.
Stefanos Tsitsipas set himself the target of claiming a Grand Slam title in 2020 after winning last year’s season-ending ATP Finals but the young Greek feels that in hindsight the statement was “too big” and burdened him with extra pressure.
Leicester City will hold practice matches at an empty King Power Stadium to prepare their players for games without fans when the Premier League resumes this month, manager Brendan Rodgers said.