Last year's ATP Finals champion, Grigor Dimitrov, has linked up with Andre Agassi this week and hopes the former world number one can become a more regular part of his team. [It will be] great to play him again'.
Third seed Federer is playing the Paris Masters for the first time since 2015 and is bidding to clinch the tournament for just the second time after winning it in 2011.
Ninth seed Barty broke Garcia once in each set to win the round-robin tie 6-3, 6-4 in one hour and 16 minutes. The Serbian, victor of this year's Wimbledon and US Open titles, will now return to top spot for the first time in two years regardless of how far he goes in Paris.
Yet his opponent, Milos Raonic, pulled out because of injury, leaving Federer to think that it had actually turned out to be a blessing in disguise.
Novak Djokovic advanced to the Paris Masters quarterfinals when Damir Dzumhur retired trailing 6-1, 2-1 on Thursday. The quarters could bring Kevin Anderson, who beat Federer at Wimbledon, or Kei Nishikori, who pressed him hard in five sets in his title run at the 2017 Australian Open.
A double break of serve put Federer 4-1 up before Fognini broke back with a backhand victor down the line.
Oil under pressure from rising output, but Iran sanctions loom
But he added: "In the past few months our people have faced hard times and it's possible that the next few months will be hard ". The waivers are being granted for continued import cuts, so that oil prices do not shoot up, the official added.
"As everyone knows, I have been out of competition since the US Open", he told a news conference.
Seeking a record-equalling 33rd Masters and record-extending fifth Paris title, Djokovic will face a much more challenging test in the last eight against Marin Cilic.
'In the next match against Novak it will be another big challenge.
Raonic, from Thornhill, Ont., was coming off a tough 6-7 (4), 7-6 (5), 7-6 (5) first-round win over France's Jo-Wilfried Tsonga on Tuesday.
The second-ranked Serb set up match point with an ace and sealed victory on his third match point when Sousa returned a second serve long.
Djokovic arrived in Paris knowing that he would regain the top spot he relinquished two years ago if he bettered the Spaniard's performance at the indoor event he has won four times.
Austrian sixth seed Dominic Thiem reached the quarter-finals in Paris for the first time, seeing off in-form Borna Coric 6-7 (3/7), 6-2, 7-5. Elsewhere, German fourth seed Alexander Zverev, playing his 70th match of the season, defeated Frances Tiafoe of the United States 6-4, 6-4 while defending champion Jack Sock put out Richard Gasquet 6-3, 6-3.