Factfile on Schalke 04 and Real Madrid ahead of the Champions League last 16, first leg tie between the clubs on Wednesday:

Form: Real Madrid's quest to win that elusive 10th European Cup takes them into a meeting with Schalke, a club they have never met but whom Raul represented for two years after leaving the Bernabeu. Madrid are unbeaten in 26 games in all competitions and moved three points clear at the top of La Liga - the first time they have led the table since May 2012. Schalke are eight matches undefeated themselves, but could only manage a goalless draw at home against Mainz in the Bundesliga on Friday. However, they will draw encouragement from the fact that Madrid have won just once in 25 previous visits to face German opposition and were hammered 4-1 by the Royal Blues' Ruhr rivals Borussia Dortmund last season.

Coaches:

Schalke - Jens Keller (GER) -- 43 yrs

Real Madrid - Carlo Ancelotti (ITA) -- 54 yrs

Leading scorers in all competitions:

Schalke - Jefferson Farfan (11 goals)

Real Madrid - Cristiano Ronaldo (34 goals)

Domestic league performance:

Schalke - Fourth in the Bundesliga, two points behind Bayer Leverkusen in second but 21 points behind leaders Bayern Munich

Real Madrid - Top of La Liga, three points clear of Barcelona and Atletico Madrid

Group stage performances:

Schalke - Second in Group E behind Chelsea

Real Madrid - Winners of Group B ahead of Galatasaray

European Cup/Champions League best performances:

Schalke - semi-finals 2010/11

Real Madrid - winners 1956, 1957, 1958, 1959, 1960, 1966, 1998, 2000, 2002

Other honours:

Schalke - 7 x German champions (none in Bundesliga era), 5 x German Cup winners, 1 x UEFA Cup winners

Real Madrid - 32 x Spanish champions, 18 x Copa del Rey winners, 2 x UEFA Cup winners, 1 x European Super Cup winners, 3 x Intercontinental Cup winners

Previous meetings: None