Tesla's sales dropped for a sixth straight month in Sweden and Denmark in June, underscoring the challenges the EV-maker faces as competitors gain market share and CEO Elon Musk's popularity declines.

Tesla Inc. (NASDAQ: TSLA) sales have been dropping in Europe this year, and in some cases the declines have been in the mid-double digits. The worst falloff may have happened in Denmark and Sweden in June.

Tesla (NASDAQ:TSLA) is facing mounting pressure in Europe, with new data highlighting a sharp decline in vehicle registrations across key markets. In Denmark, Tesla registrations fell 61.57% year-over-year in June to 1,

TSLA hits a milestone as a Model Y completes the first-ever driverless delivery with zero human input on public roads.

Tesla posted a video of a fully autonomous Model Y driving itself to its new owner for the first time. According to Ashok Elluswamy, a Tesla engineer, the car drove 72 miles per hour on a Texas highway.