Complex sentence: Edmunds received invitations to two Grand Prix competitions, the 2016 Rostelecom Cup and 2016 NHK Trophy, but she withdrew from both events due to her recovery from the foot injury.
Split into simpler sentences: Edmunds received invitations to two Grand Prix competitions, the 2016 Rostelecom Cup and 2016 NHK Trophy. She withdrew from the Russian event due to her recovery from the foot injury.