Acer has filed a lawsuit against its former chief executive officer Gianfranco Lanci for allegedly violating a non-compete agreement. Lanci left Acer last March after the company hit a rough patch and was recently named head of Lenovo’s operations in Europe, Africa and the Middle East. “We believe Mr. Lanci has clearly breached the terms of the non-compete agreement he entered into willingly . . . we believe we have a very robust case,â€ť Acer said in a statement given to the Financial Times. The Financial Times notes that Acer has fallen from the second to the fourth largest computer maker in the world while Lenovo has seen recent success and has risen to the No.2 spot.