The hard court season continues with a handful of tournaments in Europe and America, with the ATP Stockholm Open boasting the most competitive field.
Stefanos Tsitsipas heads the seedings in Sweden with British number one Cameron Norrie slated to meet him in the final.
Tommy Paul claimed his first and only ATP title in Stockholm last year, and there will be plenty of attention on the American's first-round clash with Bjorn Borg's 19-year-old son, Leo.
Frances Tiafoe is seeded third in Stockholm but the American is finishing the season in terrific form and will be confident of going all the way.
The 24-year-old counted Rafael Nadal among his victims on the way to the semi-finals of the US Open, where he was edged out in a gruelling five-setter by eventual champion Carlos Alcaraz.
Last month, Tiafoe defeated Tsitsipas in the decisive rubber of the Laver Cup and there is little reason to expect a different result should they both make the semi-final in Stockholm.
Despite the presence of defending champion Paul, Tsitsipas and Tiafoe look comfortably the best players in the top half.
Wimbledon semi-finalist Norrie won his sole title to date on the hard court at Indian Wells last year, but the bottom half could prove tough to negotiate.
In order to reach the final, Norrie will likely have to beat Aslan Karatsev, Holger Rune and either Alex de Minaur or Denis Shapovalov.
All of those are ranked in the world's top 40, though it should be pointed out that only De Minaur has ever beaten Norrie in ATP competition.
The WTA's big two, Iga Swiatek and Ons Jabeur, have opted to miss the inaugural Guadalajara Open, but a competitive field line up for the season's final WTA 1000 tournament.
Six of the world's top 10 are in attendance at the venue that hosted last year's WTA Finals, and the end-of-season get-together will be foremost in the mind of top seed Paula Badosa.
The Spanish world number four is in danger of missing out on a place in the Finals after a weak finish to the season.
Since going out in the second round in the US Open, Badosa has won just one match, against a player ranked 196 in the world, and lost three.
Badosa has suffered a number of early exits in hard court tournaments this year and the frustration was evident in a bad-tempered defeat in San Diego to Danielle Collins a few days ago.
Maria Sakkari is another whose form could use a boost. The world number seven has been inconsistent of late and while she should make it through a few rounds, the Greek needs to start delivering if she is to make the Tour Finals.
Barbora Krejcikova is an interesting runner, returning from a short break. Despite bowing out early in the US Open singles competition, she won the doubles title and followed that up by taking back-to-back titles in Tallinn and Ostrava.
The Czech starts against Russian Anna Kalinskaya and her draw certainly gives her a shot at reaching the latter stages.
Consistent American teenager Coco Gauff is another who could go a long way, though she has to quickly recover from a thrashing at the hands of Swiatek in San Diego last week.
Andy Murray's best days are obviously behind him, but he is still capable of mixing it with the young stars of the ATP circuit and could be set for a strong showing in the European Open in Antwerp this week.
The three-time Grand Slam winner has returned to the world's top 50 this year, reaching finals in Stuttgart and Sydney, and he most recently made the quarter-finals in Gijon, losing in three sets to Sebastian Korda.
Murray is unseeded in Antwerp but fellow Briton Dan Evans is the fifth seed, while Jack Draper is also in the field.
Draper is a promising talent, but looks up against it this week as even if he overcomes Jenson Brooksby in the first round his reward is a meeting with Polish top-seed Hubert Hurkacz.