* Q2 revenues up 61 pct to $8.34 bln, beat forecasts
* Net income for the quarter more than doubles
* CEO says offline push helped drive growth
* Raises revenue forecast on Cainiao integration (Adds CEO comment, changes dateline)
BEIJING, Nov 2 (Reuters) - Alibaba Group Holding Ltd hailed an "outstanding quarter" on Thursday as the Chinese firm beat forecasts with a 61 percent revenue rise driven by continuing e-commerce growth.
The strong beat underlines Alibaba's dominant role in China's fast growing e-commerce market, which Goldman Sachs estimates will grow to $1.7 trillion by 2020.
The firm controlled by billionaire entrepreneur Jack Ma is also expanding into markets like entertainment and sports.
Alibaba Chief Executive Daniel Zhang said in a filing that a recent push to integrate its traditional online platforms with more offline services and bricks-and-mortar stores, had contributed to the growth.
The e-commerce giant reported revenue of 55.12 billion yuan ($8.34 billion) for July-September, above a 52.2 billion yuan forecast from analysts polled by Reuters.
Its net income attributable to shareholders more than doubled from a year ago, rising 132 percent to 17.7 billion yuan. Analysts had forecast a roughly 50 percent rise.
Alibaba also raised its revenue guidance for the 2018 fiscal year to growth of between 49 percent to 53 percent, from between 45 percent to 49 percent previously, due to the recent consolidation of its logistics network Cainiao.
The second quarter can be slower for Alibaba as it prepares for the annual blockbuster Singles' Day event on Nov. 11, a sales bonanza that shifts more goods than the Black Friday and Cyber Monday sales days in the United States combined.
Alibaba, whose Tmall and Taobao shopping platforms dominate online retail in China, saw revenues from its core e-commerce business hit 46.46 billion yuan, a 63 percent rise from the same quarter a year earlier.
Revenue from Alibaba's fast-growing cloud computing business was 3.0 billion yuan, up 99 percent but slowing from a 130 percent rise a year earlier. ($1 = 6.6100 Chinese yuan renminbi) (Reporting by Pei Li in Beijing and Supantha Mukherjee in Bengaluru; Writing by Adam Jourdan; Editing by Saumyadeb Chakrabarty/Keith Weir/Alexander Smith)