Champions League veterans and newcomers all feature in Wednesday's Round-of-16 games

Real Madrid and Gent both feature in the night's games

Champions League veterans and newcomers all feature in Wednesday's Round-of-16 games

Real Madrid's Luka Modric and Roma's Radja Nainggolan in action in a pre-season friendly last summer. Picture by: Andrew Brownbill / AP/Press Association Images

The Round-of-16 in the Champions League continues on Wednesday night in Belgium and Italy.

Gent welcome Wolfsburg to the Ghelamco Arena while two of Europe's aristocrats meet in the Italian capital as Real Madrid face Roma in the Stadio Olimpico.

The Belgian side became league champions for the first time last season and against all the odds have done what teams like Manchester United and Porto couldn't, in reaching the knockout stages. One of three debutants in this season's tournament, the Belgian's home form was crucial in the side finishing second in Group H.

Seven points from three games was the catalyst behind Hein Vanhaezebrouck's side reaching the knockout stages. They shocked European veterans Lyon away from home on Matchday Five with a goal from Kalifa Coulibaly. That goal was instrumental in beating the French side and Valencia to second place, behind Zenit St Petersburg.

Gent's Renato Neto andKalifa Coulibaly, celebrate after winning their Champions League match against Lyon. (AP Photo/Laurent Cipriani)

Wolfsburg are Gent's opponents on Wednesday night and the German side have had an easier ride to the Last-16. Involved in Group B, home and away wins over Manchester United were the backbone to the German side's progression.

A home win against Louis van Gaal's side in the final group game, helped Dieter Hecking's top the group. Brazilian defender Naldo scored twice to help the team to a 3-2 win.

The German side earned three points each from their games against PSV Eindhoven and CSKA Moscow and topped the table on 12 points.

Wolfsburg's Naldo and Marcel Schaefer celebrate after Manchester United. (AP Photo/Michael Sohn)

The main event happens in Rome as the Cristiano Ronaldo and his Real Madrid teammates face Roma. The teams last met in 2008, when Roma won at the same stage 4-2 on aggregate.

Ronaldo has already scored 11 goals in the six group games as Real Madrid ended the group stages with 16 points, the highest of the 32 teams. The Spanish giants, along with Barcelona are the only unbeaten teams remaining in the tournament.

Real topped the group and qualified with two games to spare. PSG were the only team to grab point from Rafael Benitez's side. Apart from the scoreless draw in Paris, Real were unharmed in the group and concluded the group stages with a record 8-0 win. Ronaldo's 11 games came against Malmo and Shakhtar Donetsk. He failed to score in either game against PSG. 

Real Madrid's Cristiano Ronaldo scored four times against Malmo. (AP Photo/Francisco Seco)

Roma were the worst team to qualify for the knockout stages, winning only six points. Over the other seven groups, three teams scored more points than Luciano Spalletti's side but ended up in the Europa League. 

The Italian side ended on six points, level with Bayer Leverkusen and despite a far inferior goal difference, qualified based on their head-to-head record with the Germans. An entertaining 4-4 draw in Germany was followed by a 3-2 win in Rome.

Barcelona were in Roma's group too, and handed the side a 6-1 defeat in the Camp Nou. The game in Rome saw one of the goals of the season though, courtesy of Alessandro Florenzi. 

Despite the mixed records of the four teams in the group stages, knockout football can cause surprises. On Tuesday night Zenit St Petersburg lost to Benfica despite winning five of their six group games.

The Champions League is finally beginning for some fans. Shocks can happen.