Jo-Wilfried Tsonga claimed his first victory since February to knock Guido Pella out of the European Open, while defending champion Damir Dzumhur suffered a first-round exit at the Kremlin Cup.
Tsonga was beaten by Peter Gojowczyk at the Moselle Open last month in the first match of his comeback from knee surgery, but was back in business with a 7-5 5-7 7-6 (7-5) victory in Antwerp on Tuesday.
The Frenchman won the tournament in Belgium last year, but has not added to his tally since, enduring a frustrating spell off the circuit due to injury.
Tsonga will face compatriot Gael Monfils in what should be an entertaining second-round encounter after the flamboyant sixth seed eased past wildcard Ruben Bemelmans 6-0 6-3.
Gilles Simon was another French player who moved into the last 16 at the expense of Sergiy Stakhovsky on a day which saw eighth seed Robin Haase bow out with a straight-sets defeat to qualifier Ilya Ivashka.
Sixth seed Dzumhur's reign as champion in Moscow was ended by Egor Gerasimov, the world number 217 from Belarus pulling off a 6-1 6-7 (5-7) 6-2 upset.
Nick Kyrgios responded to his first-round exit at the Shanghai Masters by defeating Andrey Rublev 6-3 4-6 6-4, but eighth seed Martin Klizan went down 6-1 7-6 (8-6) to Andreas Seppi.
Benoit Paire, Dusan Lajovic, Evgeny Donskoy, Ricardas Berankis and Mirza Basic also negotiated their way into the second round.
Fifth seed Lucas Pouille made an early exit in the Stockholm Open, losing 6-4 6-4 to Tennys Sandgren.
Fernando Verdasco and Hyeon Chung had no such trouble, beating Matthew Ebden and Taylor Fritz respectively in straight sets.
15. November 2018
|Rays´ Snell, Mets´ deGrom win Cy Young Awards|
|Dinwiddie to debut Stan Lee-inspired shoes against Heat|
|Iberostar Tenerife and Segafredo Virtus Bologna stay perfect in BCL|
|Rooney wanted to finish career at Manchester United|
|Red Sox give manager Cora contract extension through at least 2021|
|WATCH: Ronnie O´Sullivan hits blue with calamitous break-off shot|
14. November 2018
|Matuidi: Mbappe has a great personality, like Ronaldo, Messi and Zlatan|
|Cilic beats Isner to hand Djokovic semi-final spot|
|Mendy undergoes knee surgery|
|Warriors´ Curry will not play during three-game road trip|
|Ramos refuses to retaliate after Lovren jibe|
|Qatar pull off shock win over Switzerland|
|Tuilagi could make England return against Australia|
|Rooney has earned England reward - Sarachan|
|Croatia thrashing means nothing now – Luis Enrique|
|Chelsea and Everton among Arnautovic suitors, claims agent|
|TJ Watt hopes to win NFL sacks race with brother JJ|
|Modric defends Ramos after Lovren comments|
|Southgate hails ´outstanding´ Delph as he talks up England strength in depth|
|No war with Manchester United over Fellaini, insists Martinez|
|Rooney to wear number 10 shirt against USA and receive armband from Delph|
|I don´t feel pressure of Liverpool expectations, claims Klopp|
|Steelers´ Roethlisberger texted Bell but ´didn’t hear back´|
|Reus and Kroos to sit out Germany´s clash with Russia|
|Van Dijk happy to recommend De Ligt if Liverpool ask|
|Sauber announce launch of junior programme|
|No ´breathtaking tennis´ in Djokovic´s win against Zverev|
|Curran: England spinners will be key in Kandy|
|Djokovic charges past Zverev to move closer to ATP Finals progression|
|Messi is a football alien - Malcom|
|Sky´s the limit for Sancho, says Dortmund team-mate Pulisic|
|Radwanska retires from tennis at 29|
|Maybe one day - Pulisic open to Premier League move|
|Suso ´proud´ of Real Madrid speculation but happy at AC Milan|
|Betis president convinced Lo Celso will stay|
|Injured Holder out of Bangladesh tour|
|Germany face relegation, final spots up for grabs - Nations League state of play|
|James Rodriguez out for several weeks with knee injury|
|Curran´s brilliant fifty rescues England´s innings|
|Lenglet: No problem with Dembele at Barca|
|Townsend rings the changes for Springboks clash|
|Claudio Ranieri´s managerial career in Opta numbers|
|Mahmudullah´s first century in eight years boosts Bangladesh|
|Fellaini gets the chop ahead of 31st birthday|
|Maradona: Solari will not last at Real Madrid|
|Molinari: Race to Dubai success would not surpass Ryder Cup glory with Fleetwood|
|Dortmund star Sancho was a Bayern target, confirms Salihamidzic|
|Gerrard enjoying ´buzz´ of management|
|Hamilton questions approach to Formula One expansion|
|Ranieri honoured to lead ´exceptional´ Fulham squad|
|Solari saw Isco out of shape - Ceballos|
|Ranieri replaces Jokanovic at Fulham|
|Durant keeps details of Green spat ´in-house´ but envisages resolution|
|Rooney: Kane and Sterling are England superstars|
|Messi will make Argentina return, says Maradona|
|Warriors drop Hawks as Green serves suspension|
|In-form Healy sends Australia into semis|
|Former NBA star McGrady says Carmelo Anthony should retire|
|Celtics´ Smart: We have to look at ourselves in the mirror|
|Federer plays down preferential treatment talk|
|Mourinho is better than Guardiola – Maradona|
|Mbappe plays down Pele comparisons|
|Don´t worry bro – Mendy responds to Trump|
|Melvin, Snitker win manager of the year awards|
|Warriors´ Green suspended for Hawks clash|
|Asensio: It´s not for me to lead Madrid|
|Rooney ready to enjoy England farewell after pressure of ´Golden Generation´|
13. November 2018
|Ludwigsburg stun high-flying Murcia in BCL|
|Rams v Chiefs moved to LA due to Mexico City field conditions|
|Skriniar discussing new Inter contract, confirms agent|