Aug 23 (Reuters) - Liverpool have refused to allow Mohamed Salah to travel to Africa for World Cup qualifiers with Egypt next month because he would be forced to quarantine on his return to England, the Egyptian Football Association (EFA) said on Monday. It opens up the possibility of similar refusals from other European clubs ahead of next month’s World Cup qualifiers in Africa, Asia, the CONCACAF region, Europe and South America, and puts them on a potential collision course with FIFA. “The Egyptian Football Association had received a letter from Liverpool apologising for the inability of its player, Mohamed Salah, to join the national team for next month’s African qualifiers for the World Cup. It could also affect Liverpool’s Brazilian trio of Roberto Firmino, Alisson Becker and Fabinho, who have been called up for next month’s qualifiers against Chile, Argentina and Peru. "The regulations have reflected this process, as best as is possible at the global level.