It came on the same day that the Russian side's manager, Luciano Spalletti, was sacked.
With Jose Mourinho recently being caught on tape bemoaning the quality of his strikers, and rumours of a possible move for Fernando Torres to Inter Milan circulating, the Brazilian striker has caused many people to assume he is bound for Stamford Bridge.
Hulk has long been linked with a move to Chelsea, but there is no indication at this stage that the former Porto star has any discussions with the Stamford Bridge hierarchy on his itinerary.
But with no Champions League football being played in London this week, it is unclear exactly what "work" Hulk has lined up.
It is possible that Luiz, not to mention Oscar, tried to persuade Hulk of the merits of a move to England.
Spalletti was sacked after falling out with a number of Russian players at Zenit but Hulk may well have been unsettled by the departure of the man who paid £50m to sign him from Portugal.
Chelsea have had problems with their strike force this season; Torres and Samuel Eto'o have only 11 Premier League goals combined this season.
Since the loss of Didier Drogba in 2012 they have been unable to find a replacement who will score 20 or more goals in a season.
The 27-year-old Hulk may well be the man to finally fill Drogba's shoes. Not only is he an intimidating physical presence, he is also a proven goalscorer.
Hulk scored 54 goals in 99 league appearances for previous club Porto before moving in 2012, per UEFA.
And according to FIFA, he has scored nine times in 15 appearances in this season's league campaign.
It is a return like this that Mourinho should be expecting from his strikers, and he is not getting it from the likes of Torres.
Furthermore, the Brazilian is versatile. He can play either as a central striker or wide on the flanks.
Considering the Chelsea boss' penchant for playing various systems, Hulk would be an ideal buy for the west London side.
Chelsea already have players around which to build a team in the likes of Oscar and Eden Hazard.
Hulk could fit right into this squad without causing much disruption and he would add goals at the same time.
Chelsea are currently seven points clear at the top of the Premier League table. They have achieved this without a prolific striker.
Add the likes of Hulk to the mix and Chelsea will be an intimidating prospect for any side in Europe.
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