Having knocked out Real Madrid with a 4-1 win at the Bernabeu in the previous round, Ajax came from behind to beat Juventus 2-1 in Turin and complete a remarkable 3-2 aggregate win in their quarter-final.
Cristiano Ronaldo scored the 750th goal of his remarkable career in a 3-0 win over Dynamo Kyiv on Wednesday
The last time the five times European champions reached this stage of Europe's elite club competition was in 2009 when they went out to Chelsea in a dramatic 7-5 aggregate defeat.
Arsenal took a seven-point lead at the top of the Premier League after a scoreless draw with Nottingham Forest on Saturday.
A summary of sports events and sports persons, who made news on Wednesday
Since winning 2-1 at home to Wolfsburg in September, United have scored only twice in three Champions League games. In the Premier League the record is five goals in the last six games.
Both teams will be hoping their key players step up as the league phase reaches a decisive stage.
Mancini, who comes up against the Premier League leaders in the Round of 16 first-leg at the Turk Telekom Arena in Istanbul on Wednesday, does not fancy his side's prospects.
The Bavarians, who have won the last seven league titles in Germany, last lifted Europe's top club trophy in 2013.
Schalke 04 are hoping their freshly-found discipline under new coach Roberto Di Matteo, coupled with his Champions League pedigree will help them beat Sporting Lisbon on Tuesday for their first win in the competition this season.
AC Milan's place in the Champions League is not a foregone conclusion and could be blocked by UEFA's emergency panel.
Porto and debutants Malaga became the first teams to reach the last 16 of the Champions League when they guaranteed their progress from the group stage with two games to spare on Tuesday.
Sky Sports Germany reported that the 38-year-old will miss the Bundesliga club's next four games, including the second leg of the Champions League tie at Leverkusen.
A summary of Wednesday's group matches in the UEFA Champions League.
Divya Deshmukh not only became the first Indian woman to win the FIDE Women's World Cup, she also instantly secured the prestigious Grandmaster title.
Bayern Munich are confident they have overcome a mini-slump just in time for their Champions League round of 16 second leg against Juventus on Wednesday as they chase a treble of titles this season.
Check out the points table of 2014 Champions League T20 tournament.
India crowned champions despite loss to Bangladesh in SAFF U-17 Women C'ships
Indian Super League side FC Goa was drawn along with superstar footballer Cristiano Ronaldo's Al Nassr of Saudi Arabia in Group D of the AFC Champions League 2.
Instead, Allegri said on Monday, he would throw on all his best attacking players in an attempt to outscore his opponents in the first leg at the Juventus stadium.
Manchester City beat Dynamo Kiev 3-1 during their UEFA Champions League round of 16, first leg match in Kiev on Wednesday.
Despite their first-leg advantage, Pochettino warned against complacency and said he wanted his team to play for another win, although they have had one day less to prepare than the Germans.
Manchester United and Chelsea secured places in the Champions League with wins on the final day of the Premier League season while Watford and Bournemouth were relegated along with bottom club Norwich City.
Arsenal's dramatic 2-1 Champions League win against Anderlecht on Wednesday rescued three valuable points but the victory only served to paper over the ever-widening cracks.
India will be hoping that Abhishek Sharma returns to his destructive ways and the other batters up their game against spin when the side takes the field for its final T20 World Cup league fixture against the Netherlands.
Paris St Germain substitute Edinson Cavani, criticised by French media lacking composure in front of goal, responded in style to earn a 2-1 home win over Chelsea in their Champions League last-16 first leg on Tuesday.
There is still plenty to be decided in the final round of group matches in the UEFA Champions League this week even though 13 of the 16 teams through to the knockout phase are already known. European Cup holders Manchester United and the likes of nine-times champions Real Madrid, Barcelona, Juventus, Arsenal and Liverpool have secured their places in the first knockout round.
Monaco owe most of their recent success to their young guns, but when they face Manchester City looking to overturn a two-goal deficit in their Champions League last-16 tie on Wednesday, they will turn to a more experienced player in Radamel Falcao.
Messi's Inter Miami lead Leagues Cup quarter-final lineup as average match viewership reached 1.43 million, up 62% from 2024.
The victory saw the unfashionable Madrid club tighten their grip on the coveted fourth spot in the table by moving on to 58 points after 36 games, three points clear of nearest challengers Sevilla, who lost to Leganes on Friday.
Images from the UEFA Champions League matches played on Wednesday
Australia, despite missing key pacers, are overwhelming favorites against Ireland in their T20 World Cup opener.
Manchester City look to take an important step in their transformation into one of the world's leading clubs on Tuesday by reaching the Champions League semi-finals for the first time.
Surprise package FC Basel will be the only reigning domestic champions in action in the Champions League this week as they host Bayern Munich in the first leg of the round of 16.
Red Star Belgrade, who won Europe's premier club competition in 1991, engineered a 2-0 home victory against HJK Helsinki thanks to a Richmond Boakye header and substitute Milan Pavkov's sweeping 90th-minute finish.
Photos from the Champions League match played between Real Madrid and AS Roma at the Stadio Olimpico on Wednesday
Defender Miguel Britos was sent off for head-butting an opponent as Napoli lost 3-1 at champions Juventus on Saturday, all but ending their hopes of Champions League football next season.
Arsenal will be out to show they have learnt the lessons of last season's painful home defeat by Bayern Munich when the sides meet again in the first leg of their Champions League last-16 tie in London on Wednesday.
Jose Callejon took advantage of Napoli's numerical advantage in the 48th minute of the playoff round second leg tie, handing them an away goal which, added to their 2-0 win from the first leg, effectively ended Nice's challenge as it left the French side needing to score four goals.