Needs a spell. Not the worst outcome if it is only a twinge.
Calf's can be tricky, let's hope it is minor. Recovery times depending on severity:
Severity of Muscle Strains. Muscle strains are graded as mild, moderate and severe. The more severe the strain, the longer the time to recover.
First Degree (Mild). This injury is the most common and usually the most minor. This injury is a ‘pulled muscle’ with a structural disruption of less than 5 percent. With a first-degree injury, you can expect to be back to sports within 1 to 3 weeks.
Second Degree (Moderate). This injury consists of a more significant, but still incomplete muscle tear. This a partial muscle tear and requires 3 to 6 weeks of rest and recovery before you can return to full activity.
There is a 3rd degree but no way it was that from what I saw seemed on the mild side IMO