Originally Posted by Overeemforehand-YYR-23
They are, check out the pictures and look for the string pattern and throat, it is the VCore, anybody who demoed would recognize them.
Wawrinka has a leather grip underneath the over-grip and I saw some lead on his first picture using didn't notice the lead at 3&9 anymore.
I think Tomic also has leather grip, but I didn't see any lead as of now, maybe somebody else saw something else. Tomic is cracking the ball.
You wouldn't see any lead because Yonex puts the lead in when they are making the racquets for players.