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India's local poster boy of online retail,Watch Pinku katto: Futoku aishite fukaku aishite Online Flipkart, has a big problem. A $5 billion big problem to be precise.

Amazon India may have surpassed Flipkart to become the biggest online retailer in the country last month. This comes weeks after Seattle-based company’s boss announced that he will be investing an additional $3 billion in India, making the total investment in the country to $5 billion dollars in three years.

Amazon India had better gross sales in the month of July, reports Livemintciting five people with knowledge of financial numbers. The American company's Indian subsidiary had gross sales (value of goods sold) of over Rs 2,000 crores, a figure that Flipkart missed. However, when gross sales from Flipkart-owned Myntra, and recently acquired fashion company Jabong are taken into consideration, the Indian company is still at the top, the report added.

Flipkart, however, disputes the claims.

"We continue to have a significant lead over the competition on all important customer parameters including sales. We are also the market leader in the biggest categories of e-commerce including mobiles, fashion, home, electronics and appliances. Our sales are witnessing a steady growth and in the recent months, we have significantly raised the bar of execution, speed of customer delivery and product quality," a Flipkart spokesperson told the publication. 

Though Flipkart, founded in 2007, still assumes its lead in the Indian e-commerce market, it is facing more competition than ever from Amazon India, which entered the country in 2013. Flipkart had 37 percent of the market share in India as of March this year, while Amazon India's was pegged between 21 to 24 percent during the same period. To make things worse for Flipkart, Amazon India is attracting more people on the website, according to data from several marketing research firms including web analytics SimilarWeb.

Amazon India has been making aggressive moves in recent months. Last month, the company made its same-day-delivery service Amazon Prime available in over 100 cities in India, and announced it will be bringing its on-demand video streaming service Amazon Video to the country soon. India's e-commerce market is estimated to be worth $119 billion by 2020.

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