Messi, Klopp, Lampard, Haaland... UCL Opta numbers in hand

Champions League holders Liverpool face Salzburg for the first time in their history on Wednesday as Jürgen Klopp aims to extend his unbeaten record at Anfield.

Opta facts for UCL Wednesday

The Reds lost 2-0 to Napoli in their opening group fixture, increasing the importance of a result against a Salzburg side that thrashed Genk 6-2.

Exciting teenager Erling Haaland – son of former Premier League defender Alf-Inge Haaland – scored a first-half hat-trick in that match and should be ready for the trip to Merseyside after battling illness.

Barcelona, meanwhile, could have the fit-again Lionel Messi available for their date with Inter, a chance for the star forward to break his duck against the Serie A side.

Elsewhere, Frank Lampard heads to France in search of his maiden Champions League win in charge of Chelsea, while last season's semi-finalists Ajax visit Valencia.

Here is the pick of the key Opta facts for Wednesday's eight matches.

Genk v Napoli

6 - Napoli are without a win in their past six away games in the Champions League group stage (W0 D2 L4), last prevailing on the road with a 2-1 defeat of Benfica in December 2016.

13 - Genk have won none of their 13 Champions League matches (W0 D7 L6). Only Irish side Shamrock Rovers and Maltese outfit Floriana have played more games without winning (14 each) in the competition's history.

Liverpool v Salzburg

19 - Reds boss Klopp remains unbeaten after 19 matches at Anfield as Liverpool manager (W15 D4 L0). His streak is 10 games shy of Bob Paisley's club record.

2 - Salzburg striker Haaland will attempt to become the second player to score more than once in each of his first two Champions League appearances, Diego Simeone having done so for Atlético Madrid in September 1996.

Slavia Prague v Borussia Dortmund

13 - Czech champions Slavia handed out 13 Champions League debuts in their Group F opener, a 1-1 draw at Inter. The only player to feature who had previously appeared in the competition was Nicolae Stanciu.

68 - Dortmund have scored with just two of their past 68 attempts at goal in the Champions League and have been held goalless in five of their six most recent outings.

Barcelona v Inter

3 - Barca captain Messi has been directly involved in 15 goals in his past 17 games against Italian teams (12 goals, three assists), but has failed to score in any of his three Champions League meetings with Inter.

2003 - Inter boss Antonio Conte was an unused substitute for Juventus the last time an Italian coach won a Champions League match at Camp Nou, a quarter-final clash in 2003. Marcello Lippi was in charge of the visitors.

RB Leipzig v Lyon

5 - Each of Timo Werner's five Champions League goals have been scored away from home. No player has hit more on the road without scoring in their own stadium.

18 - Lyon striker Moussa Dembele is one game away from equalling former AEK Athens midfielder Vassilios Tsiartas' unwanted record for most Champions League appearances without winning, which stands at 18 (set between 1994 and 2003).

Zenit v Benfica

9 - Artem Dzyuba has been involved in nine goals in nine Champions League matches for Zenit, scoring six times and registering three assists, including one for Sardar Azmoun in his side's 1-1 draw against Lyon.

10 - Since the start of the 2017-18 season, Benfica have lost more Champions League group stage games (10) than any other team.

Lille v Chelsea

8 - Ligue 1 side Lille are winless in eight Champions League home matches since a 3-1 victory over AEK in October 2006, having gone undefeated in their first eight at home.

2 - Frank Lampard is in danger of becoming the second Englishman to lose his first two matches as a manager in the Champions League, after Ray Harford with Blackburn Rovers in September 1995.

Valencia v Ajax

2 - Valencia, 1-0 winners at Chelsea in their Group H opener, are looking to start a Champions League campaign with two consecutive victories for the first time since 2006-07, when Quique Sanchez Flores was in charge.

41 - Ajax captain Dusan Tadic has created 41 chances in the Champions League since the start of last season, more than any other player in the same period.