Nike Inc’s quarterly revenue and profit blew past Wall Street expectations on strong sales in China, but lower-than-expected growth in North America, its biggest market, overshadowed the beat. The world’s largest footwear maker faces intense competition from brands like Adidas, Skechers and VF Corp’s Vans in North America, even as it pushes to sell exclusive merchandise through its tap-and-buy SNKRS app and retail stores. In its attempt to gain market share over rivals, Nike has collaborated with celebrities, ramped up sneaker launches and increased marketing around major sporting events.In November, the company ended a two-year-old partnership with Amazon.com Inc to sell Nike’s merchandise directly on the online retailer’s website, to focus more on sneaker launches on its own digital platforms. Nike’s revenue from North America rose 5.3% to $3.98 billion in the second quarter, compared with the previous year’s 9% rise, but missed Wall Street expectations of $4 billion. In Greater China, the fastest-growing market for Nike, revenue rose 20% to $1.85 billion. The company recently introduced its app in the country, which outgoing Chief Executive Officer Mark Parker said on Thursday was downloaded 1 million times.