In preparation for the return of the Premier League on June 17, Jurgen Klopp decided to split his squad and pit them against each other at an empty Anfield on Monday.
"It's great. When we came back all together, it was like, 'Wow, how many players we have," Lovren told Liverpoolfc.com.
"When you look at all the faces, it's like, 'Here is quality.'
"The other day we played and it was great to see some players in good shape after such a long time not playing.
"Then you come back and you're like, 'My God, we need to really work even harder for a spot.'
"It was quite a tough game but we really enjoyed playing against each other. It was quite a good test for what will come to us."