In his latest Net Talk column, Andy Schooler looks at some of the unsung heroes of the tennis tour - the racquet stringers.
British number one Heather Watson was knocked out in the first round of the Prague Open on Monday.
Seventh seed Mikhail Youzhny was knocked out of the Istanbul Open at the first time of asking on Monday.
Wild-card Alexander Zverev is into the second round of the BMW Open in Munich after beating Benjamin Becker.
Jonas Bjorkman will head up Andy Murray's coaching team for the first time at the BMW Open in Munich this week.
Our tipster Andy Schooler is opposing Roger Federer on the ATP World Tour this week with 16/1 and 40/1 shots.
Kei Nishikori retained the Barcelona Open title with a 6-4 6-4 victory over Pablo Andujar in Sunday's final.
Guillermo Garcia-Lopez claimed the BRD Nastase Tiriac Trophy in Bucharest after beating Jiri Vesely in the final.
Angelique Kerber recorded a three-set win over Caroline Wozniacki to win Stuttgart's WTA tournament.
Martina Navratilova has ended her coaching link-up with Agnieszka Radwanska after just five months.