Yes, they can initiate a relationship and get their rocks off, but you simply don't pick someone up from a bar, or a night club to just spend a night. This is especially true when you are on national duty with your team, and your first time at that. They could have unknowingly spread that to their national team-mates who would have carried that to their club, plus their own club mates when they join up after the international break. The virus has a couple of weeks of incubation period before you may show symptoms.
I caught it when treating a patient who had COVID-19, and unfortunately, spread it to my family without knowing. Trust me, this virus is not something you want to catch.