In football, it is normal for players to decline, because no matter how good a person is, they can't resist the ruthless years, and the two biggest problems for football players are injuries and age, which is the main reason for the decline of players.
But the decline of a player is a slow process, if a player's decline is too fast, so long is not normal, and even makes people feel sorry and unexpected, here are a few stars who have a surprising degree of decline:
Kaka
Kaka's heyday was at AC Milan, in the 2008-09 season Kaka scored 16 goals in 31 games in Milan, and 16 goals were also his most goals in Milan's Serie A.
Shevachenko
Shevachenko in Milan can be described as a roar, in Milan 7 seasons Shevachenko scored 137 goals in Serie A, in the 2005-06 season Shevachenko scored 19 goals in 28 games in Milan, such a high efficiency can also be seen that Shevachenko is still a top star, but in the 2006-07 season after transferring to Chelsea, Shevachenko only scored 4 goals in 30 games in the Premier League, which can be said to be completely useless.
The post-transfer decline of these two superstars from Milan has to be regrettable, and it can be said that they are very rare in the history of football. Although Ronaldinho also declined very quickly in the later period of Barcelona, he still had a few years of peak, and this year I thought that Ronaldo had declined rapidly, but the recent recovery makes people have to admire Ronaldo's professionalism.