(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window) Aug 13 (Reuters) - European stocks scaled new highs on Friday and were on track for their fourth consecutive week of gains on optimism over a strong earnings season and steady recovery from the pandemic-led economic downturn. The pan-European STOXX 600 index inched up 0.1% by 0712 GMT to hit a record high for the tenth straight session. Retailers and travel & leisure stocks were the top sectoral gainers. Adidas rose 1.8% after it said it was selling Reebok to Authentic Brands Group for up to 2.1 billion euros ($2.5 billion). Pet supplies retailer Zooplus shot up 40.4% after it accepted a takeover offer worth around 3 billion euros ($3.5 billion) from U.S. private equity firm Hellman & Friedman. French healthcare company Ipsen fell 9% after it withdrew a U.S. new drug application for palovarotene, its treatment for an extremely rare disease that causes muscles and tissue to turn to bone. (Reporting by Sruthi Shankar in Bengaluru; Editing by Shounak Dasgupta) Our Standards: The Thomson Reuters Trust Principles.