Euro zone shares set for biggest weekly fall this year with Greece in focus
* Euro STOXX 50 steady but set for biggest weekly drop since Dec
* Sunday's Greek referendum on bailout a major focus
* PMI surveys confirm continued private sector growth in euro zone
* Banks under the spotlight after more regulatory issues emerge
By Alistair Smout and Liisa Tuhkanen
LONDON, July 3 (Reuters) - A top euro zone share index was set for its biggest weekly fall this year on Friday, with focus on a crucial vote in Greece over its debt negotiations at the weekend.
The euro zone Euro STOXX 50 was on track for its worst week since December, down 4.2 percent since last Friday's close, and flat on the day at 3,463.57.
The FTSEurofirst 300 was also steady at 1,527.32 points by 0801 GMT, down 3 percent for the week and set for its biggest weekly fall since late April.
The market has been hit by concern over mounting tensions between Greece and its international creditors since the government in Athens announced a surprise referendum over its bailout programme. Continuación...