Fitness

The modern game is all about the squad. The deeper your bench, the better chance you have of success, especially if you have a super sub. Substitutes are the players not selected in the starting 11. They can be brought on during the match to replace players, due to injuries, for tactical reasons, poor performance, or fitness concerns. In the Premier League there are 9 substitutes on the bench, 5 of which can be used during three substitution windows. The number of players on the bench increases to 12 for Champions League matches.

Traditionally, hydration breaks are used during games when temperatures hit a certain threshold, typically 32°C or above. It’s a short break for players to take on liquids. For the 2026 World Cup, a new, mandated hydration break was brought in. There is one hydration break halfway through each half when the ball goes out of play, and they last for three minutes each. It’s a big talking point, a stealth way for more advertising to be shown during matches, frustrating viewers in the stadiums and at home.

Carefully controlling how much a player plays to prevent injuries. Involves resting players who've played too many minutes, monitoring training loads, and sometimes sitting out less important games. Modern sports science tracks everything. Fans complain when their best players get rested, but the alternative is burning them out. The fixture congestion in modern football makes it more important than ever.

A player who's always getting hurt. Whether it's bad luck, poor training habits, or physical fragility, the pattern repeats. Clubs hesitate to invest heavily in injury-prone players because you can't rely on them. The label can be unfair when injuries are random, but some players genuinely seem to break down every few months.

How often a player is fit and can be selected. "The best ability is availability" is famously linked to NFL Hall of Fame Coach Bill Parcells, but it applies across all elite sport. Players who miss lots of games through injury affect squad planning, momentum, and results. Clubs now track injury history carefully in recruitment. Eden Hazard at Real Madrid is the cautionary tale - constantly injured, barely played.

Sprinting back to help defensively after being caught up the pitch. Full-backs who've pushed forward, midfielders who've joined an attack, strikers who lose the ball - they all need to make recovery runs. The best players do it without thinking, even when tired. Recovery runs prevent counters and show commitment. Players who don't make them become defensive liabilities.