Tournaments: Does improving the playing field really help?

[Shai Gilgeous Alex4Nigger]

Hi.

My question is whether, improving the playing field in a tournament (exactly the World Cup -1998-), it will give you the plus of 2%, 4% and 6% if you are local?
Because, I am in a situation of, if improving the playing field will improve the chances of winning, or is it better to improve the training to be able to improve the substitutes when I need them?

Thank you, if you have read and I hope for your response as soon as possible...

[Shai Gilgeous Alex4Nigger]

PLS CONTEST

[szakika10]

in principle, it increases the chances of winning