Reigning Champions League winners Liverpool fell to a 1-0 defeat at Atletico Madrid while tournament debutants Atalanta, the first team to reach the knockout rounds of the competition after losing their first three group stage games, were one of two big winners in the Round of 16 first leg action in the 2019-20 UEFA Champions League.
Four of the eight home teams won their first leg games, but perhaps more crucially, five teams scored what could be priceless away goals when the Round of 16 concludes in three weeks' time.
Bayern Munich's prolific Polish marksman Robert Lewandowski was on target for a sixth consecutive game in this season's competition as the Bavarian giants look to have taken a huge stride towards reaching the quarter-finals after a commanding 3-0 win at Chelsea.
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In other results, Dortmund beat Paris Saint-Germain 2-1 at home, Barcelona were held to a 1-1 draw at Napoli, Manchester City won 2-1 at Real Madrid, while Italian champions Juventus stumbled to a 1-0 reverse away at Olympique Lyonnais.
On that note, let us have a look at 5 interesting stats from the first leg of Round of 16 action from this season's Champions League.
# 1 Timo Werner is the first player to score 7 Champions League away goals before scoring one at home
Timo Werner was the difference between RB Leipzig and Tottenham Hotspur in the former's first-ever knockout game in the Champions League, following the German striker's penalty in the first leg in north London.
It was Werner's fourth goal in this season's competition, taking his overall Champions League goal tally to seven. Interestingly, all seven of Werner's goals in the continental competition have come away from home, making him the first player in Champions League history to score seven away goals without netting one at home.
#2 Erling Haaland is the quickest to score 10 Champions League goals
Either side of a Neymar tap-in for visiting French champions Paris Saint-Germain, Borussia Dortmund's new winter acquisition Erling Haaland scored a brace to become the quickest player to score 10 goals in the Champions League.
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The former Salzburg striker, who scored eight goals in the group stage of this season's Champions League before moving to Dortmund, has continued his love affair with European club football's blue riband competition by scoring in all but one of his seven games.
# 3 Bayern are the third team in the Champions League era to win their first 7 games in a season
Following a goalless first half, Serge Gnabry opened the floodgates for Bayern Munich in the first leg of his team's Round of 16 game at reigning Europa League winners Chelsea.
The Bayern winger scored a brace on the night before Robert Lewandowski applied the coup de grace on a fine team performance to all but shut out Chelsea from the tie. With the goal, Lewandowski took his goal tally for the season to 11, one ahead of Dortmund's Norwegian sensation Erling Haaland.
Bayern, who became only the sixth team to win all their group stage games in a season, have now joined Barcelona (2002-03) and Real Madrid (2014-15) as the only teams to win their first seven games in a season in the competition. Quite ominously, for their title prospects though, neither Barcelona nor Real Madrid went all the way in those seasons.
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#4 Robert Lewandowski equals Cristiano Ronaldo's record of most away goals in a season
Continuing his strong start to this season's competition, Robert Lewandowski scored in his sixth consecutive game in the Champions League as Bayern Munich won 3-0 at Chelsea in the first leg of the Round of 16.
In the process, Lewandowski moved one ahead of Norwegian teenager Erling Haaland's tally of 10 goals in this season's continental competition, and also emulated Cristiano Ronaldo's 2013-14 record for the most away goals (9) in a Champions League season.
#5 Dries Mertens becomes the joint all-time top scorer for Napoli
With his opener for Napoli against visiting Barcelona in the first leg of the Round of 16 tie between the two teams, Dries Mertens scored his 121st goal in all competitions for the Partenopei.
In the process, Mertens moved level with the club's all-time record scorer Marek Hamsik. The Belgian, whose present contract with Napoli will end at the end of the season, has now scored six times in the Champions League in the ongoing campaign, his best-ever return in a single edition of the premium club competition.
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