Elon Musk warned of a hard year ahead for Tesla Inc., adding to the automaker’s woes after reporting one of its worst quarters of the last decade.

Tesla is facing mounting challenges after reporting a sharp decline in revenue and profits for the second quarter. CEO Elon Musk warned of potentially “rough quarters” ahead, as the company grapples ...

Tesla has posted one of its weakest quarters in years, as CEO Elon Musk battles to keep the once dominant EV maker’s market ...