Wentzel was handed the captaincy at Kingsholm with regular skipper John Hart sidelined through injury for a lengthy spell.
The experienced lock insisted his team had already moved on from the Gloucester result ahead of welcoming the Warriors to Adams Park on Sunday.
Wentzel said: "We were all very disappointed with the game down at Gloucester and we're doing a lot of work this week looking at what went wrong and what we need to improve.
"You can't sit here and simply dwell on what went wrong last week. It was a bad loss for us for sure but I wouldn't say we were totally outplayed, we lost the game through silly errors we made and we can fix that."
Wenztel welcomed the arrival of Namibia back-row Tinus Du Plessis this week being impressed with the flanker/No 8 at training in Acton.
The South African added: "He is a very tough guy and he is fresh."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.