Barcelona's Lionel Messi and Real Madrid's Cristiano Ronaldo are the undisputed top two players on the planet, combining for the last seven World Player of the Year honors and shattering goal records along the way.
With both still in their primes, they figure to be trading the Champions League all-time goal record for the coming years. Each tied and passed former Real Madrid star Raúl's mark of 71 last season, and have a head-to-head battle on their hands (or on their extremely gifted feet).
We'll be tracking their heated Champions League duel from here on out.
Scroll over the timeline below to watch each player's historic goals, doing so with the knowledge that the next closest active player is Zlatan Ibrahimovic... with 44.
Lionel Messi and Cristiano Ronaldo: More Records
MOST GOALS IN LA LIGA HISTORY: Messi (289)
MOST HAT TRICKS IN SPANISH COMPETITION: Messi (32)
MOST HAT TRICKS IN LA LIGA HISTORY: Ronaldo (28)
MOST GOALS IN A SINGLE CLUB SEASON: Messi (73)
MOST GOALS IN A CALENDAR YEAR: Messi (91)
MOST GOALS IN A SINGLE CHAMPIONS LEAGUE SEASON: Ronaldo (17)
MOST GOALS IN A SINGLE CHAMPIONS LEAGUE GROUP STAGE: Ronaldo (11)
MOST ALL-TIME GOALS IN EUROPEAN CLUB COMPETITION: Ronaldo (82)
COUNTRY'S ALL-TIME LEADING SCORER: Ronaldo (Portugal, 55)