If that's not enough to put the kibosh on a potential sale to Real Madrid, you also have the issue of price.
A fan favourite, set to remain at Chelsea.
Hazard only has two years left on his current contract and has refused to sign an extension worth £300,000 a week.
Real seem to have found a way around that by making a combined offer incorporating Courtois, who previously spent time in Madrid on loan with Atletico and still has family based in the city. Hazard's arrival from Chelsea could hamper the duo's progress, with the Belgian likely to be a first-choice forward.
The Brazilian is a particularly attractive option because new manager Julen Lopetegui wants more wide players in order to free up Gareth Bale, the Welshman being tasked with replacing Cristiano Ronaldo.
We thought that Eden Hazard was top of Real Madrid's summer transfer wish-list, but it looks as though they may have been priced out of a move for the Belgian.
On the USA tour they will have Borja Mayoral and Raul de Tomas, two strikers with potential but they are not yet ready for a prominent role in the team while Vinicius also is only 18 and a player for the future.
In the past week or so it finally became an exciting summer transfer window at Chelsea.
Hazard has lit up the Premier League since arriving from Ligue 1 side Lille for £31.5million in 2012 when he was widely regarded as one of the most exciting emerging talents on the continent.
Isco and Asensio seemingly now have the onus on them to vindicate Lopetegui's decision and be the flag bearers for Real Madrid in the upcoming campaign.