Sinisa Mihajlović

In a statement, the Serie A club said their head coach was "absolutely asymptomatic" after the results of the swab test.

Mihajlovic will now begin two weeks in isolation, in line with national guidelines in Italy.

Bologna also tested their primavera team, with all of those coming back negative.

The first-team squad and coaching staff are due to be tested on Monday.

Mihajlovic was diagnosed with leukaemia last year and spent time away from the Bologna bench to undergo a bone marrow transplant.

He signed a contract extension until 2023 in June.

The 2020-21 Serie A season is due to begin on September 19.

Mihajlovic was part of Eriksson's Lazio team that won the 1999-2000 Serie A title, with his set-piece prowess, fierce tackling and combative attitude making Mihajlovic a standout figure in that era.

His death was announced by his family on Friday, with Mihajlovic succumbing to leukaemia at the age of 53.

As well as playing spells in Italy with Roma, Sampdoria, Lazio and Inter, Mihajlovic was a European Cup winner in 1991 with Red Star Belgrade and a long-time Yugoslavia international.

His free-kicks were among the best in the game, and he later took to coaching, with Milan, Fiorentina, Sampdoria, Torino and Bologna among the clubs he led from the touchline.

Mihajlovic and Roberto Mancini, now the Italy head coach, were both highly influential figures in Eriksson's great Lazio side.

"Mihajlovic was a very successful player," Eriksson told Italian broadcaster Sky Sport 24. "For him there was no such thing as finishing second. He was generous, an intelligent and fabulous player. He was someone who helped everyone in the team, especially the youngsters. It's all very sad.

"He was a great coach even when he was still a player. He had to become a coach, it was known. He was a very intelligent player, he understood everything in football, I didn't need to talk about tactics with him.

"I don't know how many games Lazio have won due to his free-kicks or penalties. I remember that he was a very successful man and very helpful with everyone.

"He was different from me in terms of character, but the respect that existed was the secret of that team. This made Lazio great. It was impossible not to like Sinisa, he was positive, cheerful. It was a huge pleasure to work with him."

Former Lazio striker Christian Vieri added, in an Instagram post: "It's hard to find words today. Rest in peace great warrior."

Mihajlovic was sacked by Bologna in September after a disappointing start to the season, ending his second spell as head coach with the Rossoblu.

Milan great Andrea Pirlo paid his own tribute to Mihajlovic, writing: "A great man as well as being a great footballer... You have always proved to be a loyal warrior. Goodbye Sinisa."

Another former on-field adversary, Gabriel Batistuta, wrote: "How many battles on the field. Goodbye Sinisa."

Italian FA (FIGC) president Gabriele Gravina said he was "deeply saddened".

"Sinisa was a protagonist on and off the field, an example of passion, determination and courage, able to inspire and excite," Gravina added. "Mihajlovic was a true champion as a player, as a coach, but above all as a person.

"In an era often marked by falsehood, he has always known how to put the truth before him, not underlining his defects and his weaknesses."

Napoli president Aurelio De Laurentiis added his own salute, saying on Twitter: "A great man leaves too soon. A coach that in the past I had thought of bringing to Naples. A person of great human depth. A fighter who defied the disease with the courage of a lion."

Red Star Belgrade labelled Mihajlovic "a great star and a man with an incredible heart and strength", adding: "Our club expresses its deepest condolences to the Mihajlovic family. To him be eternal glory!"

The Bologna boss, who was a coach at Inter during Ibrahimovic's time there, claims he has received assurances from Ibrahimovic that he will once again be a free agent when his short-term deal at San Siro expires.

Ibrahimovic has scored three times in eight appearances since returning to Milan in January after two years in MLS with LA Galaxy.

"He called me a few days ago and we'll see what he decides to do in the summer," Mihajlovic told Serbian show Vece sa Ivanom Ivanovicem.

"He certainly won't remain at Milan, it remains to be seen whether he'll join us or return to Sweden."

The 38-year-old began his career at Malmo before moving to Ajax and he has a statue outside his first club's stadium.

However, his relationship with Malmo's fans has been soured due to Ibrahimovic's part ownership of rivals Hammarby and the striker's monument has been vandalised on numerous occasions.

A move to Bologna could therefore be appealing to Ibrahimovic, with Mihajlovic not expecting to encounter the type of problems ex-Barcelona coach Pep Guardiola had with the brash Swede.

"Ibra treats me differently from the others, he watches what he says and how he behaves," Mihajlovic added.

"That's because dangerous people recognise each other!"

Ibrahimovic is due to be out of contract after the 2019-20 Serie A concludes, though there is an option to extend the deal by another year.

The veteran striker signed a short-term deal to return to Milan in January but it appears increasingly unlikely Ibrahimovic will still be at San Siro next season.

Ibrahimovic had been linked with Bologna before he joined Milan, largely due to his relationship with the club's head coach Sinisa Mihajlovic - who was on the backroom team at Inter when the forward was with the Nerazzurri, and reports of a renewed attempted to sign the Swede surfaced in recent weeks.

But, speaking last month, club director Walter Sabatini seemed to quash the idea and sporting director Riccardo Bigon has also now said there is no chance of bringing Ibrahimovic to Bologna.

"I understand the media interest in making this a story, as he is such an important name at the top level, but Ibrahimovic is not a possibility," Bigon told RAI Radio 1 of the 38-year-old.

"We are no longer in contact. He had spoken to Mihajlovic in the winter, then made his choices and from then we haven't taken the situation into consideration."