This is the 13102nd most frequent Russian word.
матчах
"Матчах" is the plural form of "match," meaning "matches" (sports games or contests).
In this sentence, 'матчах' appears in the prepositional case plural form, indicating the context or topic of discussion is the matches themselves, specifically the ones in which the teams participated.
В этих матчах участвовали сильнейшие команды страны.
The strongest teams in the country participated in these matches.
Here, 'матчах' is in the prepositional case plural as well, used to specify the location where 'late arrivals' occur—during or at the football matches.
Он всегда поздно приходит на футбольных матчах.
He is always arriving late to football matches.
In this example, 'матчах' is again in the prepositional case plural to denote the scenario or activities that took place specifically at the matches.