The Friday morning train commute was disrupted for residents in Sydney's eastern suburbs after a track fault forced the closure of the rail line in both directions between Central and Bondi Junction.

Sydney Trains said urgent track repairs were being carried out at Martin Place about 7.20am, forcing the closure of the T4 Eastern Suburbs & Illawarra Line between Central and Bondi Junction.

Track problems have forced train delays on Friday morning. Credit:Daniel Munoz

Trains travelling towards Central from Waterfall and Cronulla were also diverted through the City Circle.

Sydney Trains advised affected commuters to delay their journeys, or to use their train tickets on Sydney Buses.

A Transport Management Centre spokeswoman said the track repairs were completed and the line was reopened about 7.50am, but some delays were expected.