Kjaer netted with a bullet header in the final seconds of stoppage time of the last 16, first leg encounter at Old Trafford, levelling the scores after Amad Diallo had opened in the 50th minute with his first United goal.
The 36-year-old has already made history as the first woman to referee in the French top flight, and took charge of the 2019 UEFA Super Cup final between Liverpool and Chelsea. She also made her Europa League debut in October.
Champions League: Barcelona coach Ronald Koeman rests Lionel Messi, Frenkie de Jong for Dynamo Kiev clash
Barcelona travel to Ukraine on top of Group G with a perfect nine points after three games, three points ahead of second-placed Juventus.
Players who tested positive include goalkeepers Georgiy Bushchan and Denys Boyko, defenders Vitaly Mykolenko and Oleksandr Karavaev and midfielder Mykola Shaparenko.
Ronaldo is currently isolating at his home in Turin after testing positive for COVID-19 on 13 October while with the Portuguese national team for Nations League matches.
World League Forum institutes anti-racism committee after members express worry over racist incidents during football matches
A number of players have been racially abused by fans in recent months, with Brescia striker Mario Balotelli targeted by Hellas Verona's notoriously far-right sympathising supporters earlier this month
Tearful Shakhtar Donetsk captain Taison sent off for 'unsporting behaviour' after being racially abused by Dynamo Kiev fans
Shakhtar Donetsk captain Taison on Sunday was sent off for kicking the ball at Dynamo Kiev fans after they targeted him with racist abuse.
Europa League: Chelsea manager Maurizio Sarri slams 'dangerous' pitch at Dynamo Kiev's NSC Olympic Stadium
Chelsea manager Maurizio Sarri has expressed unhappiness with the pitch at Kiev's NSC Olympic Stadium ahead of his team's Europa League last-16 second leg tie.
Europa League: Defiant Maurizio Sarri expects to stay at Chelsea next season despite troubled debut campaign
Maurizio Sarri is already planning for next season after insisting he expects to remain in charge at Chelsea despite his troubled debut campaign.
Premier League: Maurizio Saari refuses to cofirm if Kepa Arrizabalaga will return in goal for Chelsea against Fulham
Chelsea manager Maurizio Sarri is yet to decide whether to recall Kepa Arrizabalaga for the London derby after dropping him for the win over Tottenham.
Europa League Draw: Arsenal face last-16 debutantes Rennes; Chelsea come up against Ukraine's Dynamo Kiev
After beating Swedish side Malmo 5-1 on aggregate, Chelsea might find the going tougher against Ukrainian giants Dynamo Kiev, who have been known to have an upset or two in them
Europa League: Arsenal provide respite for Arsene Wenger with 2-0 win over AC Milan; Borussia Dortmund stunned
Arsenal, who had lost their last four games in all competitions and were facing a Milan team unbeaten in 13 matches, stunned the San Siro with first-half goals from Henrikh Mkhitaryan and Aaron Ramsey
However, it was Arsenal's opponents Ostersund who grabbed the attention Twitteratti who went on a joke spree.
Arsene Wenger's Arsenal fought out a drab 0-0 draw with Red Star Belgrade but the point was enough to make sure of qualifying for the knockout round.
Bundesliga: Borussia Dortmund sign Ukraine's Andrey Yarmolenko following Ousmane Dembele's departure
Yarmolenko has signed a four-year deal after joining from Dynamo Kiev and reportedly cost Dortmund between €25 and €30 million.
Here is a look at all the Champions League matches to be played on Wednesday
It's a tough life on the road for new FIFA member Kosovo.
The 2018 Champions League final will be held in Kiev despite Ukraine's battle with Russian-backed separatist rebels, UEFA's executive committee decided Thursday, officials said.
On the Champions League opening day, five-time winners Barcelona hosts Celtic — a team it inflicted six goals on the last time they played in the group stage — and Bayern Munich takes on Russian newcomers Rostov.