Nottinghamshire

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Nottingham Forest boss Oliver Glasner says he was really pleased with the "winning mentality" that his players showed in the 2-1 friendly win against Bayer Leverkusen on Wednesday.

Winger Dan Ndoye gave the Reds the lead in the fifth minute, before the German side levelled through Patrik Schick.

The second-half was well-contested and moments before added time substitute Arnaud Kalimuendo headed home from Luca Netz's delivery to secure the win for Forest.

"It was a very good test for us," said Glasner. "Murillo got minutes, Callum Hudson-Odoi got minutes and what I was really pleased with was in the last 30 minutes of the second half, we really controlled the game.

"We created some good opportunities and played well. For me, the best thing I could see was that we wanted to win the game and showed the winning mentality."

The friendly was also Glasner's first game at The City Ground after joining the club earlier this summer.

"It was a great experience, I really enjoyed it," he added. "There were so many children here and they made it a fantastic atmosphere.

"I was getting goosebumps before the game and then I thought that it's just a friendly.

"There was so much passion and we really enjoyed it, so I want to say thank you for the support in this first game, but we still have a long way to go."

It is common practice these days for transfer fees to have performance-based add-ons. The theory is the selling club gains more if the player goes on to be extremely successful, while the buying club is to some extent protected financially if the transfer doesn't work out.

In some cases, the total value of add-ons is significant - Real Madrid could end up paying an extra £30m to Borussia Dortmund for Jude Bellingham depending on how successful he is over the course of his career in the Spanish capital, for example.

In others, like the potential £1.7m worth of add-ons Brighton's £29.78m signing of Greece Under-21 forward Charalampos Kostoulas, are less significant.

Clubs sometimes say add-ons are 'easily achievable' or 'difficult'.

Easier-to-achieve add-ons can include things like making a basic number of appearances, or scoring a certain amount of goals. Add-ons can also be attached to a team's success rather than the individual player's - a club may agree to an add-on requiring an extra payment if they qualify for Europe, for example.

Others can be more ambitious - tied to extreme levels of individual or collective success, like winning the Champions League or the Ballon d'Or.

An example of the difficulty add-ons can present when discussing valuations would be the claims made in the Portuguese media in 2022 that the first additional payment in Darwin Nunez's £64m-plus-add-ons move from Benfica to Liverpool was triggered by the Uruguayan making just 10 appearances.

Then Liverpool boss Arne Slot rejected speculation he had not started Nunez in some games because it would trigger an additional payment.

Whether Liverpool paid more for Nunez, or club captain Virgil van Dijk - for whom they paid a flat fee of £75m to Southampton in 2017 - cannot be determined without knowing exactly what add-ons were included in the Nunez deal, then figuring out which conditions he has and has not met.

Send our reporters a questions via Ask Me Anything

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BBC Sport football reporter Nick Mashiter has been answering some of your latest transfer window questions.

Malcolm asked: Nottingham Forest seem to be a bit thin on the ground for goalkeepers, unless there are any coming up through the ranks?

Nick replied: Forest do have Matz Sels and John Victor, but another goalkeeper would be useful for boss Oliver Glasner, just to add some cover.

After the exits of Stefan Ortega and Angus Gunn, any injury to Sels or Victor would leave Forest struggling for senior cover.

Victor himself is only just returning from the serious knee injury he suffered back in January.

Sels is currently expected to start the 2026-27 season as Forest's number one, with the Reds taking on Leeds in their Premier League season opener on 22 August.

The club triggered Sels' 12-month extension in July and told Club Brugge he was not for sale when the Belgian side made an approach.

Aaron Bott, who is 21 years old, regularly trains with the first team and featured on the bench in the Europa League last season, so Forest do have a young option regardless.