Manchester City fear that Vincent Kompany will miss the next three Premier League matches owing to a groin injury he suffered in the home win over Newcastle United.

The captain is expected to return for the derby with Manchester United on 22 September and with Matija Nastasic not yet in full training following an ankle injury Manuel Pellegrini has Joleon Lescott as his only fit senior central defender. The situation may accelerate City's desire to fill the gap with Real Madrid's Pepe and Atlético Madrid's Martín Demichelis of interest.

Kompany was unable to have a scan on Tuesday owing to swelling so City will not discover the severity of the problem until the test is carried out on Wednesday afternoon. The prognosis is that he could be unavailable for up to a month. This would mean the 27-year-old missing Sunday's trip to Cardiff City the visit of Hull City to the Etihad Stadium the following Saturday and the trip to Stoke City on 14 September – the first game after Belgium play Scotland during the international break.