Watching football is no longer what it used to be, and that's a good thing. There can be valid reasons to feel nostalgic about the era of washed-out colors on a flickering television screen and the exoticism of leagues in faraway lands featuring players you have never heard of, but we now all have much better access to and understanding of the reality of the sport.
Now, a substantial part of the football audience base follows the numbers, checking ratios and totals. The Messi and Ronaldo era catalyzed this trend: their superhuman output for almost two decades pushed fans to look further and further for arithmetic metrics to try and find who is actually better of the two.
What the Numbers Actually Say
The headline figures of these two legendary players’ careers are close enough to keep the argument alive indefinitely. As of writing, Ronaldo has 976 career goals to Messi's 921, from 1,330 appearances against 1,168. This means that Messi's rate of scoring is 0.79 goals per game to Ronaldo's 0.73, or, to represent it as a metric of time, a goal every 104 minutes against every 111.
Assists separate them more cleanly: 420 for Messi, 261 for Ronaldo. So do key passes, at 2,113 against 1,309, and successful dribbles, at 4,079 against 1,959. Ronaldo dominates in the air by a similar distance, with 157 headed goals to Messi's 31 and 1,066 aerial duels won against 170.
These are simple numbers, of course. The development of more sophisticated metrics was what changed the game.
The Metric That Changed the Argument
Opta's report on Premier League goalscorers, published in 2012 with data through that April, introduced expected goals, or xG. It asked the question: why had Luis Suárez needed 110 shots to score eight goals while Robin van Persie scored 26 from 140?
It was the beginning of the journey of quantifying chance quality in football. The model showed Suárez finishing roughly seven goals below expectation, separating the shooter's contribution from the goalkeeper's in a chance.
Expected goals now draws on nearly a million historical shots across more than twenty variables, and it moved from analysts' spreadsheets to Sky Sports and Match of the Day within a decade.
The Limits of xG
Opta remains a juggernaut in sports statistics, but its own explainer warns against classic fallacies: a striker who has outscored his expected goals is not owed a drought to balance the books. As is commonly explained, ten coin tosses landing heads tell you nothing about the eleventh.
Plenty of number-based entertainment has no underlying performance in it at all. Formats like UK bingo resolve entirely by chance: each draw is independent of the last, and nothing a participant does affects the outcome. The appeal is in watching a sequence arrive, which is in a sense similar to refreshing a stat page.
Notably, there is no such thing as xTrophies. Messi holds eight Ballons d'Or to Ronaldo's five and a World Cup that the Portuguese will now never lift, even if he holds the international scoring record and the higher Champions League title count.
The numbers forged the debate but were never going to produce a verdict. The Messi-Ronaldo debate will keep on raging on after both legends of the game retire, and its statistical legacy – the number-watching as a key part of the sport – has forever impacted how fans look at matches today.