Read the Tipster's predictions ahead of matchday seven.
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Celtic FC 1-1 Juventus
Having predictably galloped clear in the Scottish Premier League, Celtic will cherish the visit of the Serie A champions, who should have enough – as they did on their last visit to British shores, against holders Chelsea FC on matchday one – to earn a draw and thus preserve their unbeaten record.
Valencia CF 1-1 Paris Saint-Germain FC
Valencia have struggled of late to win at home against major opposition, and PSG now belong in that category given both their vast outlay in the transfer market and their impressive capture of 15 points in the group stage. Furthermore, Carlo Ancelotti's side are on a roll in 2013.
FC Shakhtar Donetsk 1-2 Borussia Dortmund
Both teams made up for early exits last season with outstanding group stage performances, but with Shakhtar still on their domestic winter break, and shorn of four-goal inspiration Willian (sold to FC Anji Makhachkala), the advantage lies with Jürgen Klopp's powerful Group D winners.
Real Madrid CF 3-2 Manchester United FC
The tie of the round for many, it is a tough one to call. Madrid have been out of sorts domestically, their Liga title defence effectively in shreds, but their focus is fixed firmly on this all-important bout against the runaway Premier League leaders. The first leg promises goals galore but is unlikely to decide the outcome.
Arsenal FC 0-2 FC Bayern München
Bayern have been omnipotent in the Bundesliga and will enter this fixture strongly fancied to overcome an Arsenal side seeking to avoid a hat-trick of last-16 eliminations. Fellow Germans FC Schalke 04 defeated the Gunners in London in the autumn, and Bayern have the form and firepower to provide an encore.
FC Porto 2-0 Málaga CF
Debutants Málaga were the most surprising of the eight group winners, yet no runner-up collected more points than Porto, who also won all three games at home. That run should stretch to four as the Dragons take time out from an absorbing Portuguese Liga dogfight with SL Benfica.
Galatasaray AŞ 2-1 FC Schalke 04
There will be fervent optimism among Galatasaray fans that their remodelled team, featuring celebrated new recruits Didier Drogba and Wesley Sneijder, can swat aside opponents whose domestic form has been in freefall since the autumn. It may not, however, be quite so straightforward.
AC Milan 1-2 FC Barcelona
The two clubs renew acquaintances after going head-to-head on four occasions last term. Barça came out on top then and should do so again – with the masterly and irrepressible Lionel Messi once again to the fore. A look at the league standings in Italy and Spain suggests a relatively one-sided tie.