Earlier a Lufthansa spokeswoman told the Associated Press that an injunction had been filed in Frankfurt, saying the action was "disproportionate".
German Transport Minister Peter Ramsauer had warned that the strike would hurt the country's economy as well as Lufthansa's reputation.
The airline - one of the world's largest - feared the action could cost it about 25m euros (£21.9m; $34m) per day.
The Cockpit union had arranged the action amid concerns the airline was increasingly relying on foreign pilots who fly for less pay.
It is worried that the company could try to cut staff costs by shifting jobs to foreign subsidiaries such as Austrian Airlines or Lufthansa Italia, where wages are lower.
The starting salary for a first officer in a Lufthansa cockpit is 62,000 euros, and 115,000 euros for a captain, according to the company's recruiting website.
Media reports say pilots' salaries can rise up to about 325,000 euros.
Cockpit has called for a 6.4% pay rise for pilots, more say in company decisions and commitments that pilots would keep their jobs when Lufthansa moves passengers to cheaper foreign affiliates.
But Andreas Bartels from the airline told the BBC the pilots' fear that their jobs would be outsourced was unfounded.
"That's what they fear but that's not reality. If you look to the reality, it's nothing like replacing or transferring jobs to other companies or other airlines [in] the Lufthansa airline system," he said.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.